中考英语动词时态语态非谓语形式专项练习(附答案)

中考英语动词时态、语态以及非谓语形式专项训练（附答案）1. Whe n he arrived at the bus stop, the bus _______ for 20 minu tes.A. has leftB. had leftC. has bee n awayD. had bee n away2. I _____ the League for 5 years so far.A. jo inedB. have joinedC. have bee n in3. The factory ________ si nee the February of 1988.A . has bee n ope n B. has ope ned C. was ope n D. ope ned4. Mary and Rose _______ f riends since they met in 2000.A. have madeB. have bee nC. madeD. have become5. You must n't ______ un til he comes back.A. be awayB. leaveC. be left6. The meeti ng _________ f or a week now.A. has fini shedB. has en dedC. has bee n over7. Miss Gao ____ this school for n early 5 years.A. has bee n inB. has come toC. has taught8. Be n ____ a teacher for 4 years .A. has bee nB. has becomeC. wasD. became9. I _____ home for a week.A. have retur nedB. have bee n backC. retur ned10. How long ______ he ________ ?A. diedB. has, diedC. has, bee n deadA. sleptB. was sleepingC. has sleepD. had slept12. __________ He the car for a week.A. boughtB. has boughtC. has had13. ---- H ow long ____ you ____ ill ? ---- Two weeks.A. did fallB. have, fellC. have, been14.Since 2000, he ____ his hometown.A. has leftB. has moved awayC. has been away from15.I'll lend you the book , but you can only ____ it for 2 days.A. borrowB. keepC. take16. ___________ The bus on the road for 2 hours so far.A. has stoppedB. stoppedC. has been17. ___________ Are you the jacket these days?A. wearingB. putting onC. dressingD. on18. __________ He foe 2 hours.A. got upB. has got upC. has been up19. Tom is ill in hospital. He ______ a cold for several days.A. isB. catchesC. has caughtD. has had20. ---- How long can I _ the book? ----- Two weeks.A. borrowB. lendC. getD. keep参考答案：1---5 D C A B B; 6---10 C A A B C; 11---15 B C C C B; 16---20 C A C D D( ) 1. Mr Wang _______ be in Nanjing now, he went to Beijing only this morning.A. mustn ' tB. may notC. can ' tD. needn 't()2. -Must I saty at home, Mum?--No, you ______ .A. needn ' tB. mustn ' tC. don ' tD. may not() 3. -Can you go swimming with us this afternoon?--Sorry, I can ' t. I ___________ t ake care of my little sister at homebecause my mother is ill.( ) 5. To make our city more beautiful, rubbish _____ into the river.C. can ' t throwD. may not throw() 6. -May I go out to play basketball, Dad?--No, you _____ . You must finish your homework first. A. mustn ' t B. may notC. couldn ' tD. needn 't() 7. -Where is Jack, please ? --He _____ be in the reading room.A. canB. needC. wouldD. must() 8. -Who is the man over there? Is it Mr Li? --No, it _____ be him. Mr Li is much taller. A. musn ' tB. may notC., 丄can ' tD. needn 't() 9. These books ____ __ out of the reading room Y ou have to read them here. A. can ' t takeB. must be takenC. c an takeD. mustn ' t be taken() 10. -Mum, may I watch TV now?--Sure, but you _____ help me with my housework first. A. canB. mayC. mustD. couldA. canB. mayC. wouldD. have to () 4. -May I go to the cinema, Mum?--Certainly. But yoube back by 11 o A. canB. mayC. mustD. needA. needn ' t be thrownB. mustn ' t be thrown() 21. Michael be a policeman, for he's much too short.) 11. The boy said he had to speak English in class, but he speak it after calss.A. couldB. didn ' t have toC. might)12. -Must we hand in the papers now? A. can ' t B. may not D. shouldn't--No, youC. mustn 'D. needn) 13. John A. must go there with us tonight, but he isn B. can C. will D. mayt very sure about it.) 14. Even the top students in our class can 'protbwleomrk.oSuottithi_s be verydifficult. A. can B. may C. mustD. need) 15. Put on more clothes. You be feeling cold with only a shirt on.A. canB. couldC. wouldD. must) 16. It ' s still early. You A. mustn ' t hurry C. may not hurry ) 17. -May I stop here? A. mustn ' t ) 18. A computer A. can ' tB. wouldn ' t hurry--No, youB. might notD. don 't have to hurryC. needn't D. won 'tthink for itself, it must be told what to do. B. couldn ' t C. may not) 19. -Could I borrow your dictionary? A. might ) 20. Peter A. mustA. needn ' tB. willC. canD. might not-- Yes, of course youcome with us tonight, but he isn B. mayC. canD. shouldD. willB. can ' tC. shouldD. may ' t very sure yet.A. MayB. WillC. ShallD. Must( ) 22. ________ I know your name?( ) 23. You _______ be more careful next time.A. have toB. mayC. mustD. might( ) 24. You _______ miss the lesson, though we _____ have it on Thursday.A. willB. mayC. canD. must( ) 27. I ________ like to know where you were born.A. shallB. shouldC. doD. may( ) 28. _______ you be happy!A. MightB. MustC. WishD. May( ) 29. A teacher ________ do every exercise, but a student must.A. may notB. nee dn ' tC. can ' tD. mustn 't( ) 30. The matter ________ be changed into a gas, but it _______ be heated to its boiling point.A. may; needn ' tB. may; canC. mustn ' t; needn ' tD. can; must( ) 31. Teachers and students ____________ l ook coldly at you for a day or two, but there friendly feelings in their hearts.A. mustB. canC. mayD. should( ) 32. Cars and buses ________ stop when the traffic lights turn red.A. mustn ' t; needn ' tB. neednC. mustn ' t; mustn ' tD. needn ( ) 25. Thispen looks like mine, yet it isnA. mustB. may( ) 26. What kinds of homes will we live in th are working out new ideas now.' t; mustn 't' t; needn't' t. whose _____ it be?C. wouldD. canfuture? Nobody _____ besure, but scientistsareA. canB. needC. mayD. must( )33. -Do you think his story _______ true? --1 don think so. But it sounds good.A. must beB. may beC. can beD. has to be( ) 34. Look out! The knife is very sharp. You _____ cut your finger.A. needB. mustC. shouldD. may( ) 35. -How long ______ the book be kept?--For two weeks, but you _____ r eturn it on time.A. can; mayB. may; needC. can; mustD. must; need( ) 36. -May I have an apple, Mum?--Certainly. But you _____ wash your hands first?A. mayB. mustC. canD. need( ) 37. -There is a lot of smoke coming out of the teaching building there.--Really? It _____ be a fire, most probably.A. canB. ought toC. mayD. must( ) 38. -Shall I tell John about the bad news?--No, you _____ . I think that will make him sad.A. needn ' tB. wouldn ' tC. shouldn ' tD. mustn 't) 39. -Could I call you by your first name? --Yes, youA. willB. couldC. mayD. might) 40. - Let 's go to the cinema, shall we?A. No, I can ' tB. Yes, I willC. Yes, thank youD. No, we d better not) 41. -- the man there be our new teacher?-- He be, but I ' m not sure.A. May; mustn ' tB. Can; mayC. Must; can tD. Can; can( )42. -Sometime is knocking at the door. Who _______ it be?--It _____ be Tom. He is still in the school.A. can; c an ' tB. can; mustn ' tC. might; couldD. might; may 参考答案：1—5 CADCB 6—10 ADCDC 11—15 BDDCD 16—20 DAACB21—25 BACAD 26—30 CCDBD 31—35 CDCDC 36—42 BBDCDBA) 1. -- How long may I your book?-- For a week. But you musn '__t_ it to others.A. borrow; lendB. keep; lendC. lend; borrowD. keep; borrow) 2. It won them much time to fly to Beijing from Shanghai.A. spendB. useC. takeD. pay) 3. Mr Wang be in Nanjing now, he went to Beijing only this morning.A. mustn ' t beB. may notC. canD. needn 't) 4. -Do you like the music the Moonlight Sonata? --Yes, it really beautiful.A. feelsB. soundsC. listensD. hears) 5. Lily finished the book yesterday.A. readB. readingC. to readD. reads) 6. Mrs Brown isn ' t here. She has to her baby at home.A. look atB. look forC. look likeD. look after) 7. I have to go now. please remember to the lights when you leave.A. turn offB. turn downC. turn upD. turn on( ) 8. Susan 's parents have bought a large house with a swimming pool.It ______ be very expensive.( )9. -t s too hot. Would you mind _________ the door? -- _______ . Please do it now.A. to open; OKB. opening; Certainly notC. opening; Of courseD. to open; Good idea( ) 10. I want to ______ this book for a month. A. borrowB. keepC. lendA. have; beenB. had; beenC. have; goneD. had; gone( ) 12. What a nice bag! But she ______ only thirty dollars for it. A. costB. tookC. spendD. paid( ) 13. Cotton ______ nice and soft. A. is feltB. is feelingC. feelD. feels( ) 14. I think this is the best way to solve the problem. Do you ______ me?( ) 15. -Guess who is coming to supper. A. SpeakB. SayC. TellD. Tell( ) 16. Please ______ your phones here with you tomorrow. A. takeB. bringC. carryD. lift( ) 17. Don ' t _______ your lessons. We ' ll help you. A. worryB. worried aboutC. be worried aboutD. be afraid( ) 18. The window is broken. Try to ______ who broke it.A. mustB. canC. mustn 'tD. can 't() 11. -How many times _______ you to Beijing this year? --Three times.D. getA. play withB. hear ofC. agree withD. get on well with-I don ' t know. _______ me.A. find outB. findC. lookD. look for() 19. He couldneither French nor German. So I _____ with him in English.A. speak; talkedB. talk; toldC. say; spokeD. tell; talked) 20. The ticket is on the floor. Would you please for me?A. pick it upB. pick up itC. pick up themD. pick them up) 21. If you don ' t know a word, you must the word in a dictionary.A. look upB. look downC. look overD. look out) 22. It ' s time for class. We ' d betterA. stop to talkB. to stop to talkC. stop talkingD. to stop talking) 23. There was a strange sound outside. Mary went out and around, but she nothing.A. looked; sawB. saw; sawC. watched; lookedD. looked; find( ) 24. The woman _________ the child quickly and took him to hospital.A. put onB. dressedC. had onD. was wearing( )25. -Oh, you pain ted the walls yourself?--Yes. It was not hard. The whole work didn 't ________ m uch.A. wantB. costC. spendD. pay( ) 26. -- ______ all your things, Tom! I hate them here and there. -OK, Mum.A. Put upB. Put onC. Put downD. Put away( ) 27. Yuki loves wearing strange hats because she wants people to ______ her.A. believeB. controlC. noticeD. visit( ) 28. ______ ! It's the music of Mozart. Be quiet.A. HearB. SoundC. SingD. Listen( ) 29. -The room is so dirty. _______ we clean it? -- Of course.A. WillB. WouldC. DoD. Shall( ) 30. We must do something to stop people from ______ .C. throwing litter aboutD. throwing litter intoA. to throw litter aboutB. to throw litter into参考大拿：1—5 BCCBB 6—10 CAABB 11—15 ADDCC 16—20 BCAAA 21—25 ACABB 26—30DCDD( ) 1. Don ' t make so much noise. We ________ to the music.A. listenedB. listenC. are listeningD. have listened( ) 2. I must return the camera to Li Lei. I _______ it for two weeks.A. keepB. borrowedC. have keptD. have lent ()3. -When will you tell him the good news?--I will tell him about it as soon as he _____ back. A. comes B. cameC. will comeD. is coming() 4. -Dad, please open the door, it _______ . -OK, dear. I 'm coming.A. locksB. lockedC. is lockedD. was locked( ) 5. -Did you go to Jim 's birthday party? --No, I _______ .A. am not invitedB. wasn 't invitedC. haven 't invitedD. didn 't invite( ) 6. A talk on Chinese history ______ in the school hall next week. A. be givenB. has been givenC. will be givenD. will give( ) 7. You may go fishing if your work ______ . A. is doneB. will be doneC. has doneD. have done( ) 8. -What do you think of the football match yesterday?--Well. It 's surprising. The strongest team of our school ________.A. boughtB. lentC. hadD. borrowed( )9. -Would your youn ger brother go for a pic nic this Sun day?--If I don ' t go, ________ .( ) 10. The trees must ______ three times a week.A. sawB. will seeC. see( ) 13. -Do you like watching cooking programs on TV?( ) 14. Catherin ______ the letter before her mother came into her bedroom.A. has writtenB. was writtenC. had writtenD. is writing( ) 15. The old man is quite weak after the accident, so he ______ .A. must take care ofB. must be take care ofC. must look afterD. must be looked after( ) 16. The ticket is on the floor. Would you please ______ for me?A. pick it upB. pick up itC. pick up themD. pick them up( ) 17. He ______ l i v i n g in the country to the city.A. likesB. prefersC. enjoysD. loves( ) 18. How long have you ______ the book?A. was beatenB. wonC. scoredD. was failed A. so does he B. so he will C. neither will he D. neither does heA. waterB. is watering ( ) 11. -Did you see Tom at the party?A. leftB. was leavingC. be wateredD. waters-- No, he __ ____ by the time I got there C. had left D. has left( ) 12. -Why not go to see the dolphin show with me?D. have seen --No, I don 't, but my twin brother ______ . He 's very fond of cooking.A. doesB. doC. isD. are --Because I _____ it.A. would meetB. meetC. am going to meetD. was meeting) 25. -What 's that thing with three legs?for drinking in the old days.) 27. -Hi, Lin Tao. I didn 't see you at the party.ready for the maths exam.) 28. -Excuse me. What did you say you would like to do, Miss White?--I said I 'd better go back to the office. I the forest in our country in the last ten years.)19. -Do you know him well ?--Sure. We friend since ten years ago. A. wereB. have beenC. have becomeD. have made ) 20. me carefully, boys and girls. Can youme? A. Listen to; hear B. Hear; listen to C. Hear; hearD. Listen to; hear from ) 21. -These farmers have been to the United States.-Really? When there? A. will they go B. did they go C. do they go D. have they gone) 22. I 'm sorry I haven 't got any money. Imy handbag at home. A. have missed B. have left C. have put D. have forgotten) 23. -Where is Miss Gao. Lily? --She to the teacher s 'A. has beenB. has goneC. wentD. would go) 24. When her father came back home, Joan with her friend.A. talkedB. talksC. is talkingD. was talking --It 's a cup. It A. uses B. used C. is used D. was used ) 26. His uncle in three days.A. returnsB. has returnedC. returnedD. will return--Oh, I A. am gettingB. was gettingC. gotD. have gotsomething this afternoon.) 29. WhatA. has happened doB. is happened toC. has happened atD. is happening()30. -What did Mr Jones do before he moved here?--He ______ a city bus for over twenty-five years.A. is drivingB. droveC. has drivenD. drives( ) 31. -When ______ you ______ your homework?--I had finished it before he ______ back.A. have; finished; cameB. have; finished; was comingC. did; finish; cameD. did; finish; was coming( ) 32. Look! The boys ______ happily in the river.A. swimB. swamC. will swimD. are swimming( ) 33. Every spring, many trees ______ along the river.A. were plantedB. is plantedC. will be plantedD. are planted( ) 34. The letter ______ in French. I can 't read it.A. is writingB. is writtenC. wroteD. writes( ) 35. If Mary _______ next Sunday, we will go boating together.A. will comeB. comesC. shall comeD. should come( ) 36. We expected that the English teacher ______ some advice on how to write an English letter.A. will giveB. gaveC. is going to giveD. would give( ) 37. Five years ago nobody knew him, although he ______ more than 100 songs.A. already wroteB. have already writtenC. had already writtenD. was already writing( ) 38. So far I ______ any success. However, I 'll keep trying.A. don 't haveB. didn 't h aveC. haven 't hadD. won 't have( ) 39. It was the third time that I _________ in at his office.A. have droppedB. had droppedC. droppedD. was dropping( ) 40. I often see Tom _________ homework while I am watching TV every evening.A. doB. doingC. didD. to do( ) 41. The flowers want ________ . Look, the soil is so dry.A. wateringB. being wateredC. to waterD. waters()42. -Be careful! You might fall into the water.--Thank you. I _____ I _____ so close to the pool.A. didn 't know; am standingB. don 't know; am standingC. didn 't know; was standingD. didn 't know; would stand ( ) 43. -Excuse me. Where is the sick boy sent here a moment ago?--He _____ by the doctorA. has been examinedB. will be examinedC. is examinedD. is being examined( ) 44. — Have you got the airplane tickets?--No. when I ______ to the office, all the tickets to Beijing _____ o u t .( ) 46. -Whom are you waiting for? --Gary 's parents. But neither of them ________ yet.A. arrivedB. has arrivedC. are arrivingD. is arriving ( ) 47. He ______ in bed all day long because he had a headache.A. get; have been soldB. got; had been soldC. got; had soldD. got; were being sold ) 45. -Your name again? I quite catch it.-Bartholomew Liveli. A. didn 't B. don 't C. couldn 't D. , 丄can ' tA. lieB. layC. laidD. lied( ) 48. Would you your voice a little so that everyone can hear you?A. riseB. putC. liftD. raise( ) 49. More and more people began to ________ that good health means good wealth.A. learnB. understandC. considerD. realize 参考答案：1—5 CCACB 6—10 CAACC 11—15 CDACD 16—20 ABCBA 21—25 BBBDD26—30 DBCAB 31—36 CDDBB 36—40 DCCBB 41—45 ACDBA 46—49 BBDD(四)1. It 's very important for us to learn English by ________ (make) flashcards.2. We ________ (take ) notes when the teacher had a lesson.3. I think ______ (wear) tie looks really cool.4. It ___________ (seem) that they ' re playing basketball on the playground.5. Students should be __________ (allow) to study with friends.6. When they are together, they talk instead of ________ (do) homework.7. You 're only twelve years old. Don 't get your ears _________________ (pierce).8. It 's raining now. We have to put off ____________ (have ) a picnic.9. It takes me half an hour __________ (walk) to work every day.10.If it ________ (be) fine, we 'll go fishing tomorrow.11. _____________ H e (live) in Beijing since he was eight years old.12.I think the computer __________ (invent) before the TV.13. ____________________ H e said he (be) to the Great Wall four times.14. ________________________________________ By the time I got home, my parents (have)supper.( ) 48. Would you your voice a little so that everyone can hear you?15. W hat 's your plan for the coming holiday? I __________ (visit) Beijing if possible.16. The foreigners are getting used to __________ (use) the chopsticks. 17. ____________________________ At first she had trouble (make ) compete sentences.18.I think ___________ (memorize) the words of pop songs also helps a little.19. Jim is often alone. He doesn 't seem ______________ (have) many friends.20. ______________________________________________ A s a middle school student, you should stop ____________________________________________ (wear) that silly earring.21. Cheng long ______________ (make) some great movies over the year.22. W hy it is easier __________ (learn) Chinese than English?23. _________________________ M y father used (get) up early.24. _______________________ As the name (suggest) , he is a quiet boy.25. __________________ Be sure (close) the windows when you leave.26.If I ___________ (be) you, I would take a long walk before _______ (go) to bed.27. You look tired. Why not ____________ (have) a short rest?28.My brother often practices ______________ (play) soccer after school.29.It 's too noisy. They must ____________ (listen) to the rock music now.30.I like singers who _________ (be) really cool.31. Shanghai _______________ (become) a modern city over the years.32. _________________________________ He doesn ' t know where (go) for the vacation.33. _______________________ He decided (chat) with his friend on the net.34.I am considering _____________ ( join ) the English club next week.35. Sunglasses are used for ___________ (keep) out the sun.36.I ___________ (feed) my cat, so it is full now.37. M any tall buildings _______________ (build) in our city during the last few years.38. You shouldn ' t make him _____________ (stand) so long.39. ____________________________________________ My brother will call me as soon as he (reach) here.40. She said she ________________ (not write) to her parents for a long time.41. These homeless children ___________ (look) after in the SOS village.42. His uncle ______________ (return) in three days.43.So far, they _______________ (plant) thousands of trees.44.I' m sorry ___________ (keep) you _________ (wait) for me for such a long time.45. _______________________ He was made (sing) a song for his little mistake.46. Just then I was frightened, I heard someone _________ (walk) towards to me.47. The baby is sleeping. Would you mind __________ (turn) off the radio?48. ____________________ Do you enjoy (listen) to the pop music?49. You had better not to go out now. It __________ (rain) heavily.50.If I had a million dollars, I ____________ (give) it to the charity.51. N ancy said that loud music made her ________ (feel) sad.52.I ________ (oversleep) because my alarm clock didn 't go off.53. She told me she __________ (go) on a beach vacation next month.54. Shanghai is cold this time of year. You need ___ (pack) warm clothes if you ____ (go)there.55. The man under the tree _________ (call) T om comes from India.56. W hat if everyone else _________ (bring) a present to the party?57. ______________________________ We are looking forward to (become) a volunteer.58. _______________ He likes (drop) by his friends ' homes on weekends.59.In the United States, you 're not supposed _______________ (eat) with your hands.60. W hen I got to school, I realized I _________ (leave) my homework at school.参考答案：1. making2. were taking3. wearing4. seems5. allowed6. doing7. pierced8. having9. towalk 10. is 11. has lived 12. was invented 13. had been 14. had had 15. will visit 16. using 17.making 18. memorizing 19. to have 20. wearing 21. has made 22. to learn 23. to get 24. suggests 25. to close 26. were. Going 27. have 28. playing 29. be listening 30. are 31. has become 32. to go 33.to chat 34. joining 35. keeping 36. have fed 37. have been built 38.stand 39. reaches 40. hadn ' t written 41. are looked 42. will return 43. have planted 44. tokeep ,waiting 45. to sing 46. walking 47. turning 48. listening 49. is raining 50. would give 51.feel 52. overslept 53. would go 54. to pack , go 55. called 56. brings 57. becoming 58. dropping 59. to eat 60. had left（五）1. __________________________ The maths problem can be .A.easy worked outB.easy to be worked outC. easily worked outD.easily to work out2. ______________________ Every possible means ,but none proves successful.A.has been triedB.triedC.is being triedD.has tried3. _______________ T he girl is to a rich man.A.marry withB.be marriedC.marry toD.be married to4. ____________________________ H e received a telegram that “ Mother sick ”A.wroteB.saysC.readsD.read5. ______________________ Who can you imagine to his wedding party?A.invitingB.being invitedC.was invitedD.to be invited6.I _____ t en minutes to decide whether I should reject the offer.A.gaveB.was givenC.was givingD.had givenWill somebody go and get Dr.White?7.——He' s already been ______ .A. asked forB.sent forC.called forD.looked for8.A conductor ____ to keep us in time in the singing yesterday.A.needsB.is needingC.was neededD.has been needed9.When and where to build the new factory ____ yet.A.is not decidedB.are not decidedC.has not decidedD.have not decided10. _________ Ways to stop pollution by now.A.must findB.will be foundC.are foundD.have been found11.I don ' t want anything _______ about it.A.to sayB.saidC.sayingD.having said12. ——____ t hat the sports meet might be put off.——Yes,it all depends on the weather.A.I ' ve been toldB.I ' ve toldC.I ' m toldD.I told13. ________________________________ A library with five thousand books to the nation as a gift.A.is offeredB.has offeredC.are offeredD.have offered14. ____________________________ Betty has never been heard ill of others.A.speakB.spokenC.to speakD.was said15. _________ Tom to have delivered the speech in their theatre room.A.saidB.saysC.is saidD.was said16. ——What do you think of the book?——Oh,excellent.It ' s worth ____________ a second time.A.to readB.to be readC.readingD.being read17. _____________________ Little Jim should love to the theatre this evening.A.to be takenB.to takeC.being takenD.taking.18. ____ more attention,the trees could have grown better.A. GivenB.to giveC.GivingD.Having given19. ____________ How long ___________ the English party ?A.has; been lastedB.did; lastC.was; astedD.will; be lasted20.Shakespeare was said _____ 37 famous plays in his lifetime.A.finishing writingB.to finish writingC.having writtenD.to have written21. ——My watch ____ twelve o ' clock.It ' s so late. ——Let ' s hurry up.A.is saidB.saysC.is toldD.tells22. The bridge which _____ last year looks really beautiful.A. was builtB. builtC. was set upD. had been built.23. "Have you seen the art exhibition?" "No, ___ there. "A. it was not being heldB. they didn't holdC. it had not heldD. they were holding it24. "This cloth ___ well and ____ long. ""Ok. I'll take it. "A. washes/lastsB. is washed/lastedC. washes/is lastedD.is washing/lasting25. "Hurry up, you ____ on the phone. " "Oh, I'm coming. Thank you. "A. are wantedB. are being wantedC. wantD. are wanting26. After a while an agreement ___ .A. was arrived atB. was arrived inC. was arrivedD. has been arrived27. How much do you think that vase ____ ?A. is costB. usedC. was paid forD. cost28. This liquid ___ the salt at room temperature.A. became mixed withB. was mixed by。