7. We’d better phone tomorrow; they might eat their dinner now.

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6. Life could be much easier if we could just deal with our ups and downs of life calmly.

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5. — Must I make a reply to the offer right now?

　　　　 — No, you mustn’t.

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4. How wonderful! We will appreciate the magic sight on the top of the mountain this time tomorrow.

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3. The book you are looking for is not available now, but we order one for you if necessary.

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2. Tom, this is the fifth time you have been late this month. You should do better than that.

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二、单句改错。

1. The students are busy studying day and night, for the final exam is going to come.

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3. A. shall　　　 B. will　 　　　　　　 C. would

(1) — 　　　　　　we go for a walk?

　 — I’d love to, but I have to prepare for the meeting.

(2) You 　　　　　　have the opportunity to attend my live concert.

(3) The old lady 　　　　　　sit by the river, telling her story over and over again.

(4) 　　　　　　you pass the book on to the last student?　

2. A. must　　　 B. need　 　　　　　 　C. have to

(1) Look, I 　　　　　　go now. I’ve got a meeting in five minutes. See you later.

(2) — Must I finish the form now?

　 — No, you 　　　　　　not. It is just OK to hand it in tomorrow morning.

(3) There is no bus at the moment and we 　　　　　　take a taxi.

(4) It’s snowing, so it 　　　　　　be very cold outside.

一、选择正确的情态动词填空。

1. A. can　　　 B. could　　　 C. be able to

(1) — 　　　　　　you please spare some time to help us with our experiment?

　 　— Of course, I’m free now.

(2) If you are traveling by air for the first time, you will be wondering about what 　　　　　　be taken on a plane.

(3) I won’t 　　　　　　come to office today due to a severe headache.