Question

用情態(tài)動詞can，may， must的適當(dāng)形式填空。

1. —What _____ I do for you? 
    —I want some apples.
2. My father _____ ride a bike, but he drives a car.
3. You are ill, Tom. You _____ see a doctor.
4. Children _____ play football in the street.
5. If you are not careful, a car _____ hit you.
6. —_____ I come in? 
    —Come in, please.
7. A blind man _____ see anything.
8. Please ask the policeman, for he _____ know the way to
    the hospital, I'm sure.
9. —May I use your telephone? 
    —No, you _____.

Answer 1

1. can
2. can
3. must
4. can't
5. may
6. May
7. can't
8. must
9. can't