四年级英语下册单元测试-Unit 1 My school -人教PEP版 ( 含答案)

Unit 1 My school 单元测试
姓名: 班级: 座号:
一、单选题(共10题;共30分)
1.选出不同类的单词( )
A. art B. music C. class
2.My classroom is _______ the gym.
A. next B. on C. next to
3.How many _______ are there in your school?
A. class B. classes C. classroom
4.—Is this your homework?
—Yes, _______.
A. it is B. this is C. it isn't
5.How many ______are there in your class?
A. students B. student C. a student
6.Do you have a library?
A. Yes, we do. B. No, we do. C. Yes, we don't.
7.It's next _____the art room.
A. in B. to C. next
8.Do you have _____art room?
A. an B. a C. the
9.This is the ______office.
A. teachers' B. teacher's C. teachers
10.—Here's your homework.
—_______.
A. OK B. Thank you C. Great
二、判断题(共5题;共10分)
1.We have an English class this morning. ( )
2.It's time for lunch. ( )
3.Welcome to my home! ( )
4.—Is this the music room? ( )
—Yes, it is.

5.—Do you have a gym? ( )
—Yes, we do.

三、填空题(共18分)
1.判断下列每组单词画线部分读音是(T)否(F)相同。

________ A. art B. library C. storybook

________ A. teacher B. forty C. floor

________ A. sister B. computer C. tiger

________ A. floor B. book C. football

________ A. way B. play C. playground
2.选择正确选项。


________ A. music room

________ B. computer room

________ C. library

________ D. palyground
四、择合适的选项补全对话(共10分)
A. Yes.we do.
B.Your school is so beautiful.
C.Is this your classroom?
D.It's the art room
E.How many students are there in your class?
Amy:________.
John: Yes,it is.
Amy: Wow,its so big.________.
John: Forty-eight.
Mike: Do you have a computer room?
John:________.It's next to the library.
Sarah: Is that the teachers' office?
John: No.________.
Lily:________.
John: Thank you.
五、根据短文内容判断下列各句的正误。(共10分)
We have a new classroom. It's on the third (第三) floor. There are 35 students in my class. Beside my
classroom, there is an art room. Classroom 2 is under the art room. Classroom 3 is on the first floor.
(1)We have a new classroom. It's on the first floor.( )
(2)There are 35 students in my class. ( )
(3)Under my classroom, there is an art room. ( )
(4)Classroom 2 is under the art room. ( )
(5)Classroom 3 is on the third floor. ( )
六、选择合适的词填写在横线上,使句意完整。每词限用一次。(共10分)
way, playground, art, first, hello
(1)
Welcome to my home! This ________ , please.
(2)
Go to the teachers' office. Say ________.
(3)
Wow! Your ________ room is so big!
(4)
Our classroom is on the ________ floor.
(5)
Go to the ________. Let's play games.
七、连词成句(共12分)
1.go, garden, to, the(.) (连词成句)

2.here, my, is, homework (.) (连词成句)
3.is, the, computer, room, where(?)(连词成句)
4.have, library, a, do, you(?)(连词成句)
答案
一、1—
10 CCBAA ABAAB
二、1. √ 2. × 3. × 4. √ 5. √
三、
1. F;F;T;F;T
2. D;A;C;B
四、C;E;A;D;
B
五、(1)F(2)T(3)F(4)T(5)
F
六、(1)way(2)hello(3)art(4)first(5)
playground
七、
1. Go to the garden.
2. Here is my homework.
3. Where is the computer room?
4. Do you have a library?

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人教版四年级英语下学期Unit-2测试题及听力含答案

人教版四年级英语下学期Unit-2测试题及听力含答案

人教版四年级英语下学期Unit 2测试题听力部分一、听录音,选出与内容相符的图片。

( )1.A. B.( )2.A. B.( )3.A. B.( )4.A. B.( )5.A. B.二、听录音,判断图片与内容是(T)否(F)相符。

1.( )2.( )3.( )4.( )5.( )三、听录音,判断下列句子与内容是(T)否(F)相符。

( )1.It’s time to get up.( )2.Breakfast is ready!( )3.It’s time for music class.( )4.It’s nine thirty.( )5.What time is it?四、听录音,给下列句子排序。

( )What do you have for breakfast?( )Me too.( )What time is it?( )I like milk and bread for breakfast.( )It’s 7:30. It’s time for breakfast.笔试部分五、抄写下列句子,注意句子的书写格式。

1.What time is it?2.It’s 5 o’clock.3.It’s time to go home.4.It’s time for English class.5.Let’s drink some milk.六、选词填空。

A.go to bedB.get upC.go homeD.lunchE.English class ( )1.It’s 7 o’clock. It’s time to .( )2.It’s 9 o’clock. It’s time for .( )3.It’s 12 o’clock. It’s time for .( )4.It’s 5:00 p.m. It’s time to .( )5.It’s 9:00 p.m. It’s time to .七、选择正确的答案。

译林英语四年级下册Unit 1 单元试卷(含答案)

译林英语四年级下册Unit 1  单元试卷(含答案)

译林英语四年级下册Unit 1 单元试卷(含答案)听力部分(30分)一、听录音,选出你所听到的内容。

(5分)() 1.A.black B.back C.bag() 2.A.subjects B.lessons C.make() 3.A.Science B.class C.Chinese() 4.A.happy B.fun C.nice() 5.A.Maths B.Science C.English二、听录音,选出相应的答句。

(5分)() 1.A.Nice to see you too. B.Thank you. C.Me too. () 2.A.Yes, it is. B.Yes, they are. C.Yes, I do. () 3.A.I have English and PE. B.I like English and PE.C.I don't like English and Art.() 4.A.We like Music and Maths. B.I have Music and Maths.C.We have Music and Maths.() 5.A.I like PE. It's fun. B.You like PE too.C.They all like English.三、听录音,给下列图片排序。

(12分)() () ()() () ()四、听录音,补全句子或对话。

(8分)1.Welcome to school, . Look, this is our new .We seven subjects.2.A:What do you have this ?B:We have Chinese, and .笔试部分(70分)五、选出每组单词中画线部分发音不同的一项。

(5分)() 1.A.bag B.bad C.grape() 2.A.cat B.table C.skate() 3.A.make B.have C.cake() 4.A.Kate B.panda ke() 5.A.hamburger B.grape C.snack 六、找出与所给单词属于同类的一项。

人教四年级下册英语unit2测试卷(含答案)

人教四年级下册英语unit2测试卷(含答案)

Unit2 What time is it? 单元测试卷一、判断下列各组单词画线部分发音是(Y)否(N)相同。

(12分)( )1. girl first ( )2.nurse hurt ( )3.write river ( )4.have breakfast ( )5.home to ( )6. let he二、看图,补全单词。

(12分)1. 2. 3.br kf t l ch d ner4. 5. 6.gli class m s c class P class 三、选出下列单词或短语的汉语意思。

(8分)( )1.get up A.去上学( )2. go to school B.快点( )3.hurry up C.早餐( )4. breakfast D.起床四、给下列句子选择相应的图片。

(8分) ( )1. It's time for breakfast. Drink some milk. A. ( )2. It's time for PE class. Play basketball. B. ( )3. It's time for lunch. Have some chicken. C.( )4. It's time for music class. Sing and dance. D.五、按要求完成下列各题。

(15分)1.Is it 8 o’clock? (作否定回答), .2. Breakfast is ready.(改为一般疑问句)?3.It is my book.(改为否定句)book.4.I drink milk.(改为一般疑问句)milk?5. I’m in New York.(改为一般疑问句)New York? 六、看图,给下列问句选择正确的答语。

(10分) ( )1. -What time is it?- .A. It's three o'clock.B. It's nine o'clock.( )2. -What time is it?- .A. It's seven o'clock.B. It's six o’clock.( )3. -What time is it?- .A. It's eight o'clock.B. It's twelve o'clock.( )4.-What time is it?- .A. It's twelve.B. It's twelve o'clock. 七、英汉连线。

四年级下册英语试卷-Unit 1 Our school suject 译林版(含答案)

四年级下册英语试卷-Unit 1 Our school suject 译林版(含答案)

Unit 1 Our school subject一、选出每组单词中画线部分读音不同的一项( ) 1. A. skate B. cat C. Kate D. date ( ) 2. A. make B. rat C. Sam D. can( ) 3. A. cake B. grape C. late D. have ( ) 4. A. name B. afternoon C. crayon D. lake ( ) 5. A. any B. apple C. Maths D. cap二、英汉互译1. 七门课程______________2. 一节美术课_____________3. 语文(课)和数学(课)_______________4. 喜欢音乐(课)______5. 什么课________________6. this afternoon____________7. go to the playground____________ 8. our new timetable___________9. on Monday_____________ 10. Welcome back to..._________三、选词填空1. This is________(he/his) new timetable.2. They have two________(lessons/subjects) this afternoon.3. It’s time________(for/to) PE. Let’s go to the________(park/playground).4. -What________(books/subjects) do you like?-I like Chinese and Music.5. -I like English and Science.-Me________(either/too).6. We have a Chinese lesson________(in/不填) every morning.7. -Look! There are many oranges________(in/on) the tree.-There are also many birds________(in/on) the tree.8. -Do you like________(apple/apples)?-Yes, I do. I’d like that red one.四、单项选择( ) 1. Welcome________our school.A. forB. toC. at( ) 2. -How many________do you have this term?-We have five.A. subjectB. a subjectC. subjects( ) 3. -I like Chinese.-________A. What about you?B. Me too.C. How are you? ( ) 4. -I________Music.-But I like it. It’s fun.A. likeB. don’t likeC. doesn’t like( ) 5. We don’t have________lessons on Sunday.A. someB. muchC. any( ) 6. -Here is________English book and________art book for you.-Thank you.A. an; aB. a; aC. an; a( ) 7. Who________your Chinese teacher?A. beB. isC. are( ) 8. It’s time________Music. We can play the piano in the music room.A. toB. forC. with( ) 9. It’s time________go to school now.A. forB. toC. of( ) 10. We have two Chinese lessons________Monday morning.A. onB. inC. at五、从下面II栏中选出与I栏句子相对应的答句I II( ) 1. Look at our new classroom. A. I like English and Maths. ( ) 2. It’s twelve o’clock. B. How nice!( ) 3. What subjects do you like? C. OK. Let’s go.( ) 4. Do you like Chinese? D. Yes, I do.( ) 5. I like Science. How about you? E. It’s on the desk.( ) 6. Let’s go to school now. F. Nice to meet you.( ) 7. Nice to see you, class. G. She’s my sister.( ) 8. Where’s my new timetable? H. It’s time for lunch. ( ) 9. Who’s that little girl? I. Me too.( ) 10. This is our new teacher Mr Wang. J. Nice to see you too.六、连词成句1. Music, have, we, Maths, afternoon, and, this(.)__________________________________________2. to, library, go, let’s, the(.)__________________________________________3. their, this, timetable, is, new(?)__________________________________________4. lessons, do, what, Nancy, you, have(,?)__________________________________________5. PE, what, like, you, about, I(.?)__________________________________________七、按要求完成句子1. I like English and PE.(对画线部分提问)________ ________do you like?2. We have Music.(改为一般疑问句,并作否定回答)-________ ________have Music?-No, we________.3. It’s time for lunch.(改为同义句)It’s time________ ________lunch.4. Go to the playground, please.(改为否定句)________go to the playground, please.5. They have four lessons this morning.(对画线部分提问)________ ________lessons do they have this morning?八、根据中文提示完成句子或对话1. -你喜欢什么课程?-我喜欢英语和美术。

“PEP”2024年小学四年级下册第10次英语第一单元期末试卷(含答案)

“PEP”2024年小学四年级下册第10次英语第一单元期末试卷(含答案)

“PEP”2024年小学四年级下册英语第一单元期末试卷(含答案)考试时间:80分钟(总分:120)B卷考试人:_________题号一二三四五总分得分一、综合题(共计100题)1、听力题:A ______ is a type of fish that can live in both saltwater and freshwater.2、填空题:The chameleon can change to match its _______ (环境).3、What is the hardest natural substance on Earth?A. GoldB. IronC. DiamondD. Silver答案:C4、填空题:The __________ is beautiful with all the stars at night. (天空)5、填空题:I like to __________ (动词) my __________ (玩具名) every day.6、听力题:The _______ of a wave can be visualized on a graph.7、What do we call the act of putting two or more numbers together?A. SubtractionB. DivisionC. AdditionD. Multiplication答案: C8、What do you call the person who teaches you at school?A. DoctorB. TeacherC. EngineerD. Chef9、填空题:The _______ (The Byzantine Empire) preserved many aspects of ancient Greek culture.10、听力题:A base feels slippery and tastes _____.11、听力题:The ______ helps us learn about music.12、听力题:A ______ is a type of bird that builds nests.13、听力题:Many _______ can be used for making tea.14、听力题:In a chemical reaction, the substances produced are called ________.15、听力题:The chemical formula for strontium chloride is _____.16、听力题:The kitten is ______ with its mother. (playing)17、听力题:She is _______ (coloring) a picture.18、填空题:A bee buzzes from flower to _______ collecting nectar.19、What is the main ingredient in pancakes?a. Riceb. Flourc. Sugard. Eggs答案:B20、填空题:The _____ (小鸟) made a nest in our backyard. It has three eggs.小鸟在我们后院筑了一个巢,它有三个蛋。

[译林版]四年级英语下册Unit 1 单元测试卷(含答案)

[译林版]四年级英语下册Unit 1 单元测试卷(含答案)

四年级英语下册Unit 1 单元测试卷班级姓名一、选出每组单词中画线部分读音不同的一项( ) 1. A. Kate B. that C. name D. baby( ) 2. A. cake B. apple C. cat D. back( ) 3. A. man B. many C. have D. family( ) 4. A. grape B. wake C. table D. sad( ) 5. A. ducks B. caps C. girls D. socks二、英汉互译1. 两门课程______________2. 今天下午_______________3. 音乐课时间____________4. 上一节美术课___________5. 多少节数学课___________6. go to the playground________7. our new timetable____________8. like Music and Science________9. Welcome back to school.___________ 10. Nice to see you too.__________三、根据首字母、中文提示或用所给词的适当形式填空1. Let’s________(make) an apple salad.2. This is________(he) animal.3. I want to go to the library. What about________(your)?4. I can play football________(good).5. I don’t have________(some) oranges.6. ________(过来) and have a cake.7. Where are your________(鞋子)?8. I________(不) like that.9. We can s________many birds in the tree.10. It’s M________. I have a Science lesson.四、单项选择( ) 1. How many________do you have this term?A. subjectsB. lessonsC. class( ) 2. It’s time________English.A. atB. forC. to( ) 3. We________Chinese, Maths and Music.A. likesB. haveC. doesn’t have( ) 4. Do you have________stickers?A. anyB. someC. a( ) 5. Do you have Music________the afternoon?A. inB. onC. /( ) 6. What lessons do you have________this morning?A. ofB. inC. /( ) 7. Art and Science________fun.A. isB. amC. are( ) 8. We have six________every day.A. lessonesB. lessonsC. subjects ( ) 9. Look at that girl. ________eyes are big and bright.A. HersB. She’sC. Her( ) 10. I have________English book and________art books.A. an; someB. a; someC. a; any五、从II栏中选出与I栏句子相对应的答句I II( ) 1. I like drinking orange juice. A. Nice to see you too. ( ) 2. What can you do in a PE class? B. Six.( ) 3. Do you like PE? C. I like Science and Music. ( ) 4. Dad, where’s my football? D. It’s nine yuan.( ) 5. Nice to see you, Bobby. E. I can run and jump. ( ) 6. What subjects do you like? F. I’d like two rubbers. ( ) 7. Can I help you? G. No, I don’t.( ) 8. How many lessons do you have? H. Let’s go to the playground. ( ) 9. How much is the Maths book? I. It’s in your bedroom. ( ) 10. It’s time for PE. J. Me too.六、根据所给情景,选择正确的表达( ) 1. 你想知道对方是否喜欢音乐课时,你可以问:A. Do we have Music?B. Do you have Music?C. Do you like Music?( ) 2. 开心时你和同学们又见面了,你可以这样打招呼:A. Nice to see you.B. See you next time.C. Nice to meet you.( ) 3. 开心第一天,老师会对你们说:A. Welcome back to school.B. Welcome to my home.C. Thank you.( ) 4. 你想告诉别人你今天没有体育课时,你可以说:A. I don’t have a PE lesson today.B. We don’t like PE.C. You don’t have PE today.( ) 5. 你的朋友想知道你今天有什么课时,他会问:A. What lessons do you have tomorrow?B. What lessons do you have today?C. How many subjects do you have?七、连词成句1. and, welcome, to, boys, school, girls, back(,.)_________________________________________2. playground, let, to, go, the, us(.)_________________________________________3. time, is, to, ride, a, it, bike(.)_________________________________________4. morning, lessons, they, do, what, this, have(?)_________________________________________八、阅读短文,判断正(T)误(F)It’s Monday. Peter has four lessons in the morning and two in the afternoon. Now he and his classmates are having an Art lesson. Peter is drawing a big house. Art is fun. He likes it very much. But he has only two Art lessons a week. He hopes he can have more.( ) 1. Peter has six lessons on Monday.( ) 2. Peter is having a Music lesson now.( ) 3. Peter is drawing a horse.( ) 4. Peter likes Art very much.( ) 5. Peter has three Art lessons a week.答案:一、1-5 BABDC二、1. two subjects 2. this afternoon3. time for Music4. have an Art lesson5. how many Maths lessons6. 去操场7. 我们的新课程表8. 喜欢音乐(课)和科学(课)9. 欢迎回到学校。

人教精通版(三起点)小学英语四年级下册同步练习试题(含答案)全套

Unit 1 Welcome to my new home Lesson 1同步练习一、看图写单词1._________________________________. 4.__________________________.2. _________________________________.3. _________________________________.二、把下列单词组成句子1._____________________________________( home welcome to my new)2._____________________________________( there a new bed is )3._____________________________________( at the bedroom look )三、连一连1.sofa A.in the kitchen2.hamburger B.in the living room3.bed C.on the wall4.picture D.in the bedroom四、重新排列下列字母,使其组成新单词,并写出汉语意思1.deb 2.ksed______() ______() 3.ckea 4.ebtal______() ______() 5.boonlal 6.rcahi______() ______() 7.rutcopem 8.rrambheug______() ______() 9.oklcc 10.lbal______() ______()答案一、1.bedroom 2.chair 3.bed 4.house二、1.welcome to my new room.2.there is a new bed.3.look at the bedroom.三、1.B 2.A 3.D 4.C四、1.bed 床 2.desk书桌 3.cake蛋糕 4.table桌子 5.balloon气球6.chair椅子Unit 1 Welcome to my new home! Lesson 2同步练习一、看图填单词1._______________________________2.________________________________3._______________________________4._____________________________二、翻译下列句子1.欢迎来到我的新家。

2023年译林版(三起)英语四年级下册Unit1-Unit2单元测试卷含答案

译林版四年级下册月考Unit 1-2听力部分一、听录音,选出所听句子中包含的单词。

(5分)()1.A.match B. mango C. Maths()2. A. after B. day C. at()3. A. school B. subjects C. Sunday()4. A. Chinese B. English C. Maths()5. A. see B. every C. timetable二、听录音,判断下列图片与所听内容是(T)否(F)相符。

(5分)1.()2.()3.()4.()5.()三、听录音,根据所听内容,选出合适的答语。

(5分)()1.A.OK. B. At eleven. C. It's Wednesday.()2.A.I like Music. B. We have six. C. We have English and PE.()3.A.Great! B. I like Science. C. What a pity!()4.A.It's Sunday. B. At twelve. C. It's eight.()5. A. OK. Let's go to the playground. B. Yes, I do.C. Sorry, let's go.四、听录音,根据所听对话,判断正(T)误(F)。

(5分)()1. Jane has eight subjects this term.()2. It is Monday today.()3. Jane has an English lesson this morning.()4. Mike and Jane like Art.()5. Jane has two Art lessons in a week.五、听录音,根据所听内容,补全对话。

(10分)A: Today is ________ ,isn't it?B: No, it's __________ today.A: Let's _________ and play _________.B: Sorry, I have _________ _________ lesson.A: What a pity ! Shall we play __________________ school?B: OK.A: Let's meet at__________o'clock in the _________________.B: All right.笔试部分六、判断下列各组单词画线部分读音是(T)否(F)相同。

2023年译林版三起英语四年级下册Unit 1 Ourschoolsubjects 单元测试卷含答案

译林版四年级下册Unit 1单元测试卷听力部分一、听录音,选出所听句子中包含的内容。

(5分)()e B. welcome C. colour()2. A. can't B. Art C. aren't()3.A.fly B. fan C.fun()4. A. Science B. subject C. school()5. A. Monday B. many C. Maths二、听录音,判断下列对话与所听内容是(T)否(F)相符。

(6分)()1.--What subjects do you like?-I like Maths and Art.()2.-I like Art. What about you? -I like Science.()3.-What can you do?-I can make a cake.()4.-Do you like English? - No, I like Maths.()5.-How many subjects do we have?-Seven.()6.-What lessons do we have this afternoon?- - We have Maths and PE.三、听录音,将人物与对应的学科连线。

(5分)四、听录音,根据所听内容,选出合适的答语。

(5分)()1.A. I like PE and Art. B. We have Music and Maths.C. It's five thirty now.()2.A.I like English. B. I have Chinese and Maths.C. But I don't like PE.()3.A. I have English and Art. B. OK. Let's go.C. I like Maths. It's fun.()4. A. Nice to see you. Mr Li. B. Here you are. C. It's in your bedroom.()5. A. Let's go home. B. Let's go to the bathroom.C. Let's go to the playground.五、听录音,根据所听内容,补全句子或对话。

四年级下册英语试题Unit 1 Our school subjects(Fun timeCartoon time)练习译林版(含答案)

Unit 1 Fun time- Cartoon time一、选出每组中不同类的单词( ) 1. A. timetable B. cake C. book( ) 2. A. Art B. Chinese C. subject( ) 3. A. what B. how C. playground ( ) 4. A. our B. your C. me( ) 5. A. school B. have C. eat二、按要求写词1. we(物主代词)___________2. fun(形容词)___________3. morning(对应词)_________4. don’t(完全形式)________5. four(同音词)_____________6. subject(复数)__________三、英汉互译1. 什么课程______________2. 什么课_____________3. 今天早上______________4. 在下午_____________5. 有语文课和数学课___________6. 一节美术课_________7. in the playground_________ 8. Welcome back to..._______四、单项选择( ) 1. We________two English lessons on Monday.A. haveB. hasC. likes( ) 2. --________you like this toy horse?--No, I________.A. Would; don’tB. Do; don’tC. Do; do( ) 3. We________any lessons today.A. don’t haveB. has noC. not have( ) 4. --How many________are there________the tree?--Ten.A. bird; inB. birds; onC. birds; in( ) 5. I like Chinese. But I________like Maths.A. amB. doesC. don’t五、首字母填空1. This is our new t________. Look, we have seven subjects.2. We have A________, C________ and S________in the afternoon.3. It’s time for p________. Let’s go to the p________.4. What s________do you like? I like English and PE.5. W________to my home. This is my mother.六、连词成句1. like, and, Science, I, Music(.)__________________________________2. this, you, lessons, morning, do, what, have(?)________________________________3. is, for, school, time, it(.)_________________________________4. us, to, the, let, go, playground(.)_________________________________5. have, eight, we, at, school, subjects(.)_________________________________七、按要求改写句子1. We have Maths and English this term.(对画线部分提问)________ ________do you have this term?2. We have Chinese and English every morning.(对画线部分提问)________ ________do you have every morning?3. I like Science.(改为否定句)I________ ________Science.4. I have a Science lesson this morning.(改为一般疑问句,并作否定回答)________you________a Science lesson this morning?________, I________.八、完形填空Hello, I’m Li Ming. I have____1____subjects this term. They are Chinese, Maths, English, Music, PE, Art, Science and Computer Studies. I like____2____. It’s fun. But my friend Tom doesn’t like English. He likes____3____. He can play football and____4____very well in PE lessons.( ) 1. A. seven B. eight C. six D. ten( ) 2. A. Maths B. Chinese C. English D. Art( ) 3. A. Music B. PE C. Science D. Computer Studies ( ) 4. A. eat B. sing C. toys D. basketball答案:一、1-5 1-5 BCCCA二、1. our 2. funny 3. evening 4. do not 5. for 6. subjects三、1. what subjects 2. what lessons 3. this morning4. in the afternoon5. have Chinese and Maths6. an Art lesson7. 在操场上8. 欢迎回到……四、1-5 ABACC五、1. timetable 2. Art, Chinese, Science3. PE, playground4. subject5. Welcome六、1. I like Science and Music.2. What lessons do you have this morning?3. It is time for school.4. Let us go to the playground.5. We have eight subjects at school.七、1. What subjects 2. What lessons3. don’t like4. Do, have, No, don’t八、1-4 BCBD。

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