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人教版中考英语中考英语总复习现在完成时专项及解析

人教版中考英语中考英语总复习现在完成时专项及解析

人教版中考英语中考英语总复习现在完成时专项及解析一、初中英语现在完成时1.My sister in America for two years.I miss her very much.A. studiesB. studiedC. has studiedD. is studying【答案】C【解析】【分析】句意:我的姐姐在美国学习了两年了。

现在进行时表示持续大现在的状态并有可能继续持续下去。

故C选项正确。

【点评】考查现在完成时。

2.Nancy for five years.A. was dyingB. has diedC. diedD. has been dead【答案】 D【解析】【分析】句意:南西去世五年了。

A. was dying过去进行时态;B. has died现在完成时态;C. died一般过去时态; D. has been dead现在完成时态。

句子强调的是过去开始的动作或状态一直延续到现在,句子用现在完成时态;die是一个非延续性动词,不能与表示一段时间的状语for…连用,用成be dead。

故选D。

【点评】本题考查时态辨析。

某人去世了多少年就用延续性动词的现在完成时,has been dead。

3.—Where is Catherine? I haven't seen her for days.—She Wuhan. She'll be back next week.A. has gone toB. has been toC. have gone toD. have been to【答案】 A【解析】【分析】句意:——Catherine在哪里?我好几天没见她。

——她已经去武汉了。

她将下周回来。

主语是she,所以用has,排除C、D。

A.已经去了某地,在去的路上,还没有回来;B.已经去过某地,表示去了某地,并且回来了。

根据She'll be back next week.她下周回来可知现在还没有回来,故选A。

人教版中考英语中考英语总复习英语现在完成时测试卷(有答案)

人教版中考英语中考英语总复习英语现在完成时测试卷(有答案)

人教版中考英语中考英语总复习英语现在完成时测试卷(有答案)一、初中英语现在完成时1.—What about watching the movie Big Fish tomorrow?—Oh, I it already.A. watchB. have watchedC. will watchD. am watching【答案】 B【解析】【分析】明天去看电影大鱼怎么样?哦,我已经看过了。

already是完成时的标志,故选B。

【点评】联系句意,注意辨析关键的词语,来判断所填之词。

2.I scared of dogs ever since a dog hurt me when I was five years old.A. will beB. wasC. have beenD. would be【答案】 C【解析】【分析】由since引导的从句可知主句应用现在完成时,故答案为C。

句意是:自从我五岁时被狗伤过之后我就一直怕狗。

【点评】本题考查现在完成时的用法。

3.Wow! You ________ dinner! Let's eat now.A. cookB. are cookingC. will cookD. have cooked【答案】 D【解析】【分析】句意:Wow,你做好分了,让我们现在来吃。

根据““Wow”及“now”可知本句动词的时间是现在,根据语境可知动词的状态为完成。

故选D。

【点评】动词的时态可以根据选项与上下文之间的前后关系来判断。

4.He ___________ for ten years.A. has been marriedB. marriedC. got marriedD. has married【答案】A【解析】【分析】在现在完成时态里,当出现for+段时间时,短暂性动词必须换成延续性动词。

get married需换成be married。

故选A。

【点评】该题考查的是对现完时态中的短暂性动词与延续性动词动词的掌握,这一块内容是中考的重难点,考试频率占时态考查题的一半以上。

(英语) 高中英语现在完成时试题(有答案和解析)含解析

(英语) 高中英语现在完成时试题(有答案和解析)含解析
考点:考察时态和语态
7.With the development of the intelligent robot technology, people _______ the importance of cooperating among robots, and the challenge in practice.
【答案】B
【解析】
【分析】
【详解】
考查时态和虚拟语气。句意:那不是他第一次背叛我们。我认为我们早该对他采取强硬措施了。That is/was the first time that+完成时,是固定句型;句中使用的是“That was…”,故应使用过去完成时。在固定搭配it’s (high/about) time…中,从句应使用过去时表示虚拟语气。故选B。
A.have been noticed B.are noticing
C.will notice D.have noticed
【答案】D
【解析】
【详解】
考查现在完成时态。句意:随着智能机器人技术的发展,人们已经注意到机器人之间合作的重要性,以及在实践中的挑战。结合句意可知句子用现在完成时态,people是句子主语,故答案为D。
15.—How much do you know about the Winter Olympic Games to be held in Beijing?
—Well, the media ________ it in a variety of forms.
A.coverB.have covered
A.have sprung upB.sprang up
C.had sprung upD.spring up
【答案】A

八年级下册人教版英语现在完成时专项练习(含答案和解析)及答案

八年级下册人教版英语现在完成时专项练习(含答案和解析)及答案

八年级下册人教版英语现在完成时专项练习(含答案和解析)及答案一、选择题1.Avengers: Endgame is such a wonderful film that I________ it twice.A.will see B.saw C.see D.have seen 2.Gina can’t go to the farm with her classmates because she________ a bad cold.A.is caught B.is catching C.will catch D.has caught 3.The manager reached Nanjing last Wednesday. He________there for 10 days.A.has been B.has got C.has reached D.has arrived 4.The train ________ for twenty minutes.A.left B.has left C.has been away D.is leaving 5.— When did the Mixc Shopping Center open? — It ________ for nearly half a year. A.has opened B.has been open C.was opened D.had been open 6.Though Tom _______ America for over two years, he misses his friends and relatives from time to time.A.was away from B.left C.has been away from D.has left7.—Is that man George?—It can’t be him. After all he ________ this place for years!A.has left B.has been away from C.was away from D.left8.You are too late. The film for half an hour.A.ends B.ended C.has ended D.has been over 9.—Where is your uncle? I haven't seen him for a long time.—He Shanghai for about half a year. He moved there last October.A.has gone to B.has been to C.has arrived in D.has been in 10.Both his parents look sad. Maybe they _________ what's happened to him.A.will know B.know C.have known D.are knowing 11.— I think the man over there must be Douglas.— It ________ be him. He has ________ to Australia.A.can’t, gone B.can’t, been C.may not, been D.mustn’t, gone 12.—Mum, I want to watch the news about our school. Change the channel, please!—What a pity! It is eight o'clock now. It___________ for a while.A.has been over B.was over C.has finished D.finished 13.—The fashion show will begin in half an hour, but Sandy hasn't turned up yet.—Don't worry. I________ her and she's sure to be here soon.A.will call B.have called C.am calling D.call 14.—Jim, turn down the music. Our baby is sleeping.—Don’t worry. He__________ for half an hour.A.woke up B.has woken up C.was awake D.has been awake 15.Mary said that she________ to Yangzhou.A.has never gone B.had never gone C.has never been D.had never been 16.For nearly 100 years, the heartbroken Little Mermaid ________on a rock looking out overCopenhagen's port.A.will sit B.sits C.sat D.has sat17.I think my father knows everything. He is my hero, he________ over 2500 books. A.reads B.read C.is reading D.has read 18.—James. Have you ever been to Yangzhou? It’s very beautiful, and people there are welcome.—Yes, I ________ there many times.A.have gone B.have been C.have been to D.have gone to19.It's reported that Xiangshui explosion(爆炸)__________78 persons and the doctors are trying their best to save the wounded.A.kills B.has killed C.killed D.had killed 20.—Oh, your spoken English is very good, Linda.—Thank you. I _____________in England for three years.A.have studied B.studied C.was studying D.study21.My deskmate was once a top student but she behind since she began to play online games. A.has fallen B.fell C.has felt D.has been 22.—Look! The man looks like Mr. Li.—It can’t be him. Because he with his families________Japan since last Thursday and they haven’t returned.A.has gone to B.has been to C.have been in D.has been in23.一How can you start playing games so soon, Tom?一 I ______ my homework, Mom.A.finished B.have finished C.will finish D.finish24.Since Tencent released Wechat, it ________ one of the most popular apps in the world. A.became B.has become C.has been D.was25.— Would you like to see the film The Wondering Earth with me?— I’m sorry I __________it twice.A.see B.have seen C.am seeing D.saw26.In the sentence “I have bought a new bicycle, so I can ride to school now.”, we use present perfect tense to tell ________.A.the result of a past actionB.actions that happened in the pastC.actions that happened at a certain time in the pastD.how many times an action has happened till now27.The Hong Kong-Zhuhai-Macao Bridge, as the world’s longest cross-sea bridge, ________ for over one and a half years.A.has opened B.has been open C.has been opened D.opened 28.—Sorry, I’m late. Has the meeting begun?—It doesn’t matter. The meeting ________ for several minutes.A.has just begun B.has just been overC.has just been on D.has just ended29.—Carl, are you coming with us?—I’d love to, bu t something unexpected ______.A.is coming up B.comes up C.came up D.has come up30.So far, China ________ the world’s largest highway network, with a total length of 160,000 kilometers.A.builds B.built C.will build D.has built 31.—How long ________ you ________ chemistry so far?—For almost one year.A.are; studying B.do; study C.have; studied D.will; study 32.—Bill Gates and Melinda Gates, two of the world’s richest people, said “we no longer believe we can grow together as a couple”.—I am so sorry to hear that because they ________ for nearly 30 years.A.have been married B.have got married C.have got married to D.have been married with33.— Where is Jim?—He ________ Beijing on business for a week. He’ll be back tomorrow.A.has come to B.has gone to C.has been to D.has been in 34.Online learning ________ very popular with students since last year.A.has become B.are becoming C.would become D.had become 35.The film Hi, Mom, ________ for two months. You will have another two months to enjoy it in the cinema.A.lasted B.was lasting C.will last D.has lasted 36.—Hello, Jack. This is Sandy. What are you doing?—I’m watching an exciting basketball match. It _______ for half an hour.A.begins B.began C.has begun D.has been on 37.—Have you ever worked on this farm?—Yes. I _________ cows as a farmer there for two years.A.raised B.was raising C.have raised D.will raise 38.My pet, little Puppy, has ________ for a week. I miss it very much.A.gone missing B.got lost C.been missing D.lost39.You are a collection of the experiences you ________ in your own life, so you should be proud of them even the bad ones.A.will have B.have had C.had had D.are having 40.Please turn up the music, don’t worry about the baby because he ________ for half an hour. A.woke up B.has woke up C.was awake D.has been awake 41.—Where’s your mum, Lucy?—She together with her sisters ________ the supermarket since two hours ago.A.has gone to B.has been to C.has been in D.have gone to 42.—Have you been to SuNing Plaza in our city?—No. Although it ________ for more than a week, I am far too busy to go there.A.has started B.has opened C.has been open D.has been on 43.William Shakespeare ________ for 405 years, but his works still have great influence today. A.died B.was dying C.has died D.has been dead 44.We ________ each other since I came to Shanghai, but we send emails very often. A.don’t see B.didn’t see C.won’t see D.haven’t seen 45.The movie Hi, Mom________ the hearts of many people since it was shown in February. A.wins B.won C.will win D.has won 46.—Look! How dry and clean the road is!—Yes. Someone ________ up the snow. They’re so early.A.clean B.cleaned C.has cleaned D.was cleaning 47.—Could you ________ me this book please, Daniel?—Sorry, but I ________ it for only half an hour. I haven't finished it.A.lend; have had B.borrow; have bought C.borrow; have hadD.lend; bought48.—Do you know Sunshine Town very well, Mr Chen?—Sure. I____here since I was born.A.has lived B.lived C.have lived D.lives49.My dog _______ for thre e days and I’m now very worried now and I want to find it as soon as possible.A.has been gone B.has gone C.is gone D.was gone 50.—Fou Ts’ong, whose letters from his father ________ a best seller in China for long, died in London, where he had lived for many years. The cause was the coronavirous.—What a pity!A.has been B.has become C.was D.becomes【参考答案】***试卷处理标记,请不要删除一、选择题1.D【详解】句意:《复仇者联盟:终局之战》是一部很棒的电影,我已经看了两遍。

(完整版)现在完成时讲解(含讲解及习题)(可编辑修改word版)

(完整版)现在完成时讲解(含讲解及习题)(可编辑修改word版)

(完整版)现在完成时讲解(含讲解及习题)(可编辑修改word版)现在完成时讲解一、构成:肯定式:主语+ 助动词have/has + 动词的过去分词.疑问式:助动词Have/Has + 主语+ 动词的过去分词?否定式: 主语+ 助动词have/has + not + 动词的过去分词.过去分词规则变化:a)一般情况下,直接加ed, (work---worked,water---watered, finish---finished 等;)b)以“辅音字母+ y”结尾的动词, 把y 变成i 再加ed, (carry-- -carried study---studied 等;)c)以辅+元+辅结尾且中读的动词,要双写最后一个辅音字母,再加ed。

(stop---stopped,shop---shopped)d)以不发音的e 结尾的动词,只加d(过去分词不规则变化表:二、用法:用法一:表示过去(已经、曾经或从未)发生的某一动作对现在造成的影响或结果。

标志词:①already, ②never, ③ever, ④just, ⑤yet, ⑥before,⑦once/twice/数字+ times例:I have cleaned my room. 我已打扫了房间(房间现在是干净的,不需要打扫了)They have left. --他们已经离开了,也就是说现在他们人不在这里I have never had a car (我从未有过汽车。

)I have been there twice.a)already 往往用于肯定句,用在疑问句时表示强调或加强语气;yet 用于否定句和疑问句。

He has already left here. 他已经离开这里了。

Has he already left here? 他(真的)已经离开这里了吗?(表示加强语气)My teachers haven’t had breakfast yet. 我的老师们还没有吃早饭。

(英语)英语现在完成时易错剖析含解析

(英语)英语现在完成时易错剖析含解析

(英语)英语现在完成时易错剖析含解析一、初中英语现在完成时1.He ________ for ten years.A. has been marriedB. marriedC. got marriedD. had married【答案】 A【解析】【分析】句意:他结婚十年了。

根据句意可知是从过去持续到现在的动作,应该用现在完成时。

故选A。

2.I am surprised at the new look of my hometown,for it _____ a lot over the years.A. changedB. changesC. will changeD. has changed【答案】 D【解析】【分析】我对我的家乡的新面貌感到惊讶,因为这几年改变了很多,结合over the years可知表达的动作发生在过去,对现在造成一定的影响,故用现在完成时have/has+过去分词,主语it,故has,故答案是D.3.—How do you like Treasure Island,Lucy?—It's so exciting that I _______ it twice.A. am readingB. have readC. was readingD. had read【答案】B【解析】【分析】句意:——露西,你认为《金银岛》怎么样?——它是如此令人激动以至于我读了两次。

根据twice可知已经发生了,故此处用现在完成时,故为have read,故选B。

【点评】此题考查现在完成时的用法。

4.—Where is your father?— .A. He has been to ShanghaiB. He has been in ShanghaiC. He has gone to ShanghaiD. He have been to Shanghai【答案】C【解析】【分析】句意:-你的父亲在哪儿?-他去上海了。

英语现在完成时的用法大全含解析

英语现在完成时的用法大全含解析

英语现在完成时的用法大全含解析一、初中英语现在完成时1.—How many letters you to your mother?—109 in all, since 2016.A. has, writtenB. have, writtenC. did, writeD. are, writing 【答案】 B【解析】【分析】句意:——你给你妈写了多少封信?——从2016年起,总共109封。

句中since 2016是现在完成时态常用的时间状语,其结构是主语+have/has+动词过去分词,且主语是you,则应填写have written,故答案选B。

【点评】考查动词的时态。

注意现在完成时的用法。

2.Mike used to be a top student, but he behind since he lost himself in computer games.A. fellB. has fallenC. wasD. has been【答案】 D【解析】【分析】句意为“Mike过去是尖子生,但自从迷上电子游戏以来成绩落后了”。

由since可知but后的主句用现在完成时,瞬间动词fall不能和since引导的时间状语从句连用,故用延续性动词be。

故选D。

【点评】本题考查现在完成时中非延续性动词和延续性动词的转换。

3.So far Tom with Mary _______ 50 left -behind children to do their homework after school.A. helpB. helpedC. has helpedD. have helped【答案】 C【解析】【分析】此题要掌握现在完成时的时间状语及主语+with 短语是单数的概念,即可得出答案。

选C。

4.—Your new bike is so nice! When did you buy it?—In July. I _____it for two weeks.A. hadB. have hadC. have boughtD. bought【答案】 B【解析】【分析】句意:——你的新自行车那么好看。

人教版英语英语现在完成时中考选择题(难)含答案解析推荐精选

人教版英语英语现在完成时中考选择题(难)含答案解析推荐精选

人教版英语英语现在完成时中考选择题(难)含答案解析推荐精选一、初中英语现在完成时1.—— ______you _____ out the problem, Sam?——Not yet, but I'm going to.A. Did, workB. Are, workingC. Have, workedD. Will , work【答案】 C【解析】【分析】句意:萨姆,你计算出这道数学题了吗?——还没有,但是快了。

结合语境可知上文描述的是现在已经完成的动作,故用现在完成时态。

选C。

【点评】英语中的时态主要是借助于时间状语与上下文语境来进行判断。

解答此类题型,首先要注意句子中的时间状语,如果没有则要通过分析上下文,结合语境来判断句子的时态。

英语疑问句中一般具有时态上的对应关系,注意结合这一特点进行区分。

2.—What great progress Huawei ________ in recent years!—No wonder it is widely known in all parts of the world.A. is makingB. has madeC. makesD. made【答案】 B【解析】【分析】句意:——华为近几年取得了多大的进步啊!——难怪它在世界的每个角落都出名。

根据时间状语in recent years,近几年,可知动作从过去持续到现在,时态为现在完成时have/has+过去分词,故选B。

【点评】考查现在完成时。

注意掌握现在完成时的结构have/has+过去分词。

3.—Your new bike is so nice! When did you buy it?—In July. I _____it for two weeks.A. hadB. have hadC. have boughtD. bought【答案】 B【解析】【分析】句意:——你的新自行车那么好看。

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人教版英语英语现在完成时复习含解析百度文库一、初中英语现在完成时1.Nancy for five years.A. was dyingB. has diedC. diedD. has been dead【答案】 D【解析】【分析】句意:南西去世五年了。

A. was dying过去进行时态;B. has died现在完成时态;C. died一般过去时态; D. has been dead现在完成时态。

句子强调的是过去开始的动作或状态一直延续到现在,句子用现在完成时态;die是一个非延续性动词,不能与表示一段时间的状语for…连用,用成be dead。

故选D。

【点评】本题考查时态辨析。

某人去世了多少年就用延续性动词的现在完成时,has been dead。

2.I ________ an invitation to the concert. I can't wait to go.A. receiveB. will receiveC. was receivingD. have received【答案】D【解析】【分析】句意:我已经收到音乐会的邀请,我等不及要去了。

由句意得知我已经收到去音乐会的邀请函,动作已完成造成的影响是我等不及要去,要用现在完成时,故答案选D。

【点评】考查动词时态。

根据题目所给语境推断出应使用的时态。

3.It has been three years since I ______ a teacher.A. becomeB. becameC. becomingD. to become【答案】 B【解析】【分析】题意:现在完成时里,since从句里动词应用一般过去时。

故选B。

【点评】考查现在完成时和表示一段时间的时间状语的连用用法,理解题意,即可得出答案。

4.——Where is Mr. Wang?——He together with his students ________ Zhuyuwan Park.A. has gone toB. have gone toC. has been toD. have been to【答案】 A【解析】【分析】句意:—王老师在哪里?—他同他的学生去了Zhuyuwan公园。

A. has gone to去了,没在这里。

主语是单数;B. have gone to去了,没在这里。

主语是复数;C. has been to去过,没在那里;主语是单数;D. have been to去过,没在那里;主语是复数。

本句He是主语,together with his students是介词短语,做定语不是主语,所以用has。

王老师去公园了不在这里,所以用has gone to。

故选A。

【点评】考查主谓一致和短语的用法。

5.—Look! Your teacher Miss White is over there.—No, it can't be her. She ______ to Beijing.A. has goneB. has beenC. wentD. will go【答案】A【解析】【分析】句意:--看!你的老师怀特小姐在那边。

--不,那肯定不是她。

她去了北京。

A. has gone去了某地,表示该人不在说话地点; B. has been去过某地,表示主语曾经去过某地,有这种经历;C. went过去式,去;D. will go将来时态,将要去。

根据前面的否定猜测,可知怀特小姐去了北京,故选A。

【点评】考查固定搭配have gone to。

6.He for ten years.A. has been marriedB. marriedC. got marriedD. has married【答案】A【解析】【分析】句意:他已经结婚十年了。

根据时间状语for ten years.十年了,可知本句时态用现在完成时has/have+过去分词,且谓语应为持续动词。

be married表结婚的状态,be动词的过去分词为been。

故选A。

【点评】本题考查现在完成时,注意掌握结构has/have+过去分词。

7.— Mary, I remember you several years ago.— Yes, I for 3 years.A. married, have marriedB. married, marriedC. married, have been marriedD. have married, have been married【答案】 C【解析】【分析】句意:——Mary,我记得几年前你结婚了。

——是的,我已经结婚三年了。

ago表明时态是一般过去时,所以用过去式married。

排除D。

for+时间段用现在完成时,并且用延续性动词,现在完成时的结构是have/has+动词过去分词,排除B。

marry是非延续性动词,其延续性动词是be married,be的过去分词是been,故选C。

【点评】考查一般过去时和现在完成时,注意平时识记非延续性动词及其延续性动词。

8.—How many times _______ you _______ to Beijing this year?—Three times.A. have;beenB. had;beenC. have;goneD. had;gone【答案】 A【解析】【分析】句意是:——你今年去过北京几次?——三次。

考查have been 与have gone 的区别。

have been 是指去过某地切已经回来了,have gone 是指去了某地还没有回来,根据答句Three times.可以推测已经回来了,故选 A。

9.A number of tourists _____ Yangzhou many times because such a beautiful city.A. have been toB. has been toC. has gone toD. have gone to【答案】 A【解析】【分析】句意:很多游客多次去过扬州,因为它是如此美丽的一个城市。

have been to,表示去过某个地方,have gone to,表示去了某地,还没回来。

many times是很多次,游客们应该是去过很多次,用have/has been to+地点,由于主语是复数,助动词用have,故选A。

【点评】考查现在完成时,注意have been to表示去过回来了,have gone to表示去了还没回来。

10.—Where is Catherine? I haven't seen her for days.—She Wuhan. She'll be back next week.A. has gone toB. has been toC. have gone toD. have been to【答案】 A【解析】【分析】句意:——Catherine在哪里?我好几天没见她。

——她已经去武汉了。

她将下周回来。

主语是she,所以用has,排除C、D。

A.已经去了某地,在去的路上,还没有回来;B.已经去过某地,表示去了某地,并且回来了。

根据She'll be back next week.她下周回来可知现在还没有回来,故选A。

【点评】考查短语辨析,注意平时识记其区别,理解句意。

11.My mother a good example for me since I was young.A. wasB. has beenC. will beD. is【答案】 B【解析】【分析】句意:打小以来,妈妈就是我的好榜样。

根据时间状语“since l was young”可知,主句应用现在完成时,表示动作从过去一直持续到现在。

故选B。

【点评】考查动词的时态12.My parents for twenty years by the time I was 15.A. marriedB. had marriedC. had been marriedD. had got married【答案】 C【解析】【分析】for twenty years“二十年”.为表一段时间的状语,要求谓语动词具有持续性。

而在所给选项中,只有be married表示结婚状态,具有延续性,故选C。

【点评】本题考查非延续性动词与延续性动词的转换。

13.—Lucy, is your uncle a teacher?—Yes, he is. He history for nearly 20 years.A. teachesB. has taughtC. is teachingD. will teach【答案】B【解析】【分析】句意:——露西,你叔叔是老师吗?——是的,他是。

他教历史将近20年了。

根据句中的时间状语 for nearly 20 years ,可知,表示持续一段时间的动作,用现在完成时,have/has+过去分词。

主语是he,用has,故选B.【点评】考查现在完成时,注意其常与for+一段时间连用。

14.—How do you like Treasure Island,Lucy?—It's so exciting that I _______ it twice.A. am readingB. have readC. was readingD. had read【答案】B【解析】【分析】句意:——露西,你认为《金银岛》怎么样?——它是如此令人激动以至于我读了两次。

根据twice可知已经发生了,故此处用现在完成时,故为have read,故选B。

【点评】此题考查现在完成时的用法。

15.—Your shoes are so old. Why don't you buy a new pair?—Because I all my money on an MP5.A. spendB. have spentC. am spendingD. was spending【答案】 B【解析】【分析】因为把所有的钱都花在MP5上,所以没钱买鞋。

强调过去发生的动作对现在的影响,应用现在完成时,故选B。

【点评】考查现在完成时的用法,强调过去发生的动作对现在造成的影响。

16.The volunteers ________ a lot of help to the old and the young since 2010.A. offeredB. have offeredC. are offeringD. will offer【答案】 B【解析】【分析】考查时态.句意"自2010以来,志愿者们向老人和青年提供了大量的帮助.".A过去时.B现在完成时态.C现在进行时态.D一般将来时态.since+点时间通常用于现在完成时态,结构是have/has+动词的过去分词,主语是volunteers复数,用助动词have.offer的过去分词是offered.答案是B.17.All the skirts .They very well.A. sold out;are soldB. sell out;have soldC. have been sold out;sellD. have sold out;sell【答案】C【解析】【分析】句意:所有的裙子都卖完了,他们非常畅销。

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