一、用适当的情态动词(含否定式)完成句子。
1. — The model rabbit is so lovely. Who made it?
— It ______ be Lucy. None of us except her is able to do it.
2. She ______ be slow, but at least she doesn't make any mistakes.
3. — ______ you let me have a look at your new watch?
— Of course. Here you are.
4. — Must I finish doing the reading report today, Mr Brown?
— No, you ______. You can finish it in two days.
5. — Where will you go on your winter vacation, Jim?
— I haven't decided yet. I ______ go to Sanya, or I ______ go to Guilin instead.
6. You look so weak! I think you ______ go to see a doctor at once.

1. must 2. may 3. Can/Could 4. needn't 5. might; might 6. should

二、用方框中所给词的适当形式完成句子。

1. (2024·无锡改编)Shh ...! This is a library. You ______ keep your voice down.
2. Lili ______ be at home. She has gone to the farm to pick apples.
3. (2024·云南改编)— Whose dictionary is this?
— It ______ be Sarah's. Look! Her name is on the cover of it.
4. (2024·泸州改编)— Rebecca, have you decided what to do this Saturday?
— Not yet. I ______ volunteer at the old people's home.
5. (2024·连云港改编)Modern medicine is developing quickly and now most eye problems ______ be cured.
6. (2024·广西改编)— What do you think of the chicken soup, Helen?
— It ______ really good. I'd like to drink more.
7. It ______ to rain. You need to take an umbrella.
8. — Why do you ______ tired?
— Because I stayed up late.
9. — Sorry, Mr Li. I can't hand in the report now. Must I finish it today?
— No, you don't ______. You can hand it in tomorrow.
10. It is important to ______ calm when we face danger.

1. should 2. can't 3. must 4. may 5. can 6. tastes 7. seems 8. look 9. have to 10. stay