如：You must go be bed before 22:00pm. My bike is broken, so I have to go to school on foot.

②. have to 有人称、数、时态的变化；must则没有。

如：I have to clean the classroom today. She has to finish her homework first. It was late, he had to go to school without breakfast. Practice 一、选择填空：

( )1. Mum makes me eat an apple every day ______ the doctor away. A. keeps B. is kept C. to keep D. kept

( )2. I’m getting fatter and fatter now. What should I do, doctor? --You’d better eat______ food and take______ exercise. A. less; less B. more; more C. more; less D. less; more ( )3. ---What can I do for you? ---I’d like two _______.

A. packet of tea B. packets of apple C. packets of tea D. packet of apples ( )4. Water comes to our flats __________ pipes under the streets. A. across B. along C. through D. over ( )5. Andy Wang looks _________ today. He is laughing all the way. A. happy B. happily C. sad D. sadly ( )6. The computer is connected _______ a machine. A. at B. to C. on D. in

( )7. Our head teacher is kind to us and she is like our mother, _____. A. on the way B. by the way C. in a way D. in the way

( )8. ________ you show me the way to the nearest underground station ? A. may B. must C. can D should ( )9. Electricity __________ our life easier, We must save it. A. make B. makes C. is making D. made ( )10. Jason put some rice in the pot and __________ the rice cooker . A. opened B. switched on C. closed D. turned off ( )11. I washed a lot of clothes. Who can _______?

A. tidy up them B. tidy them up C. tidy it up D. tidy up it ( )12. I asked him twice. But he didn’t ______ my questions. A. answers B. answer to C. reply D. reply to

( )13. There are _________ syllables in the word “chemical”. A. two B. three C. four D. eight ( )14. —John: May I have a packet of sweets ? —Shop assistant : ________________

A. No, it is not yours B. OK, here you are C. That’s a good idea D. Why not ? ( )15. Earth Hour started in 2007 in ________ .

A. the USA B. China C. the UK D. Australia 二、用同义词（组）替代句中的划线部分。

1．“ I don’t think it is a good way to work out the problem.” replied Mr White. A. said B. answered C. asked D. thought 2. Don’t look so foolish. It is a very easy question. A. silly B. happy C. clever 3 .---- Can I ask you a question? ---- Wait for a moment, I’m coming. A.a long time B. a short time C. at once 4. The boy is like his father.

A.likes B. sounds like C. looks like 5. You needn’t finish the work today. A.don’t have to B.can’t C. mustn’t 三、用单词的适当形式填空：

1 Yao Ming is very tall. He is at ______ (little) two metres tall.

2 With this _______ (electricity ) blanket, the grandpa won't feel cold in winter. 3 It’s _____________ of you to buy such a dress. It looks so ugly (fool )

4 The remote control doesn’t work now. I think we need to change the two _________ in it ( battery )

5 Your room is dirty and _____________. I think you know what you need to do now ( tidy ) 6. A moment _____(late), Daisy came back.

7. Benny ______(reply) “Can you get me a bag of sweets?” 8. Can Tom _____(speak) English?

9. Electricity is very helpful, but we must remember the _____(safe) rules.

10. We mustn’t touch the TV set with our wet ______(hand) because it is dangerous. 四、语法，情态动词专练

1. ( ) ----May I borrow your books? -- --Yes, you ______ .

A. may B. can C. must D. need 2. ( ) ---Can he speak English? ----________.

A .Yes, he does B.Yes,he did C. Yes, he can D.Yes, he must

3. ( ) ----_______ I swim here? ----I’m sorry. Children _____ swim alone here. A.Must; can’t B. May; must C. Can; mustn’t D. Can’t; can

4. ( ) With the help of the new technology, you _____ e-mail your friends by mobile phone. A.can B. must C. need D. should 5. ( ) ----Can I go fishing with you, Dad?

-----No, you _____. You ______ stay at home and do your homework. A.won’t; may B. can’t; must C. shouldn’t ; ought D. needn’t; should 6. ( ) Thomas, please be quiet. The others _____ hear very well. A. can’t B. mustn’t C.shouldn’t D. needn’t 7. ( ) It’s very warm today. You ____ wear the coat. A. must B. don’t have to C. have to D. mustn’t 8. ( ) Look at that man over there. he be our teacher Mr.Luo? --He be him. He has gone to Beijing.

A.May;must B.Can;may C.Can;can’t D.May;can’t 9. ( ) You _____ talk loudly in the library.

A. don’t B. mustn’t C. needn’t D. don’t have to 10. ( ) _____ climb that tall tree?

A.Do you need B.Are you need C.Need you D.Need you to 11.( )Some warm-hearted animals ___ hibernate (冬眠) A.needn’t B.does not need to C.needn’t to D.don’t need 12. ( )____I go and apologize to my teacher for my mistake? A. Should B.Need C.Can D. May 13. ( ) They _____ do well in the exam.

A. can be able to B. be able to C. are able to D. am able to 14. ( ) Must I retrun the magazine to you right now, Sandy? No, you ______. You _____ keep it until next Wednesday.

A. mustn’t; may B. needn’t; must C. needn’t; can D. can’t; may 15. ( ) I change the bulb now? --No, you may not. You switch off the electricity.

A.Can;need B.May;must C.Must;must D.Can;must

16. ( )John____ come to see us tonight, but he isn’t very sure yet.

A.may B.can C.has to D.must 17. ( )----Is Tom at home now?

----He be at home now. Because I his room just now and he answered.

A.must;called B.can’t;phone C.may;called D.must;phoned 18. ( )Shall I tell Tom something about it? --No,you . A.mustn’t B.needn’t C.can’t D.won’t

19. ( )My mother is ill. So I to look after my little brother. A.must B.may C.have to D. should

20. ( )You ____ go and see a doctor at once because you’ve got a fever. A. can B. must C.dare D. would

Unit7 Poems Key phrases

1. (not) at all 一点也(不)，完全（不） 2. (be ) worried about 为……担忧 3. newspaper stand 报摊 4. rush out 冲出去 5. a crowd of 一群 6. with tired face 带着倦容 7. hurry to work 匆忙去工作

8. change one’s idea (about sth) 改变（对某事的）看法 9. give sb advice 给某人建议 10.take sb’s advice 接受某人建议 11.find out 找出，查明 12.high up in the cloud 高入云层