Bài 3
1. When my father was young, he _____ work in the garden for long hours.
a. can
b. could
c. will
d. should
2. He_____ have committed the crime because he was with me that day.
a. mustn't
b. shouldn't
c. won't
d. couldn't
3. Since we have to be there by 8.30, we_____ take a taxi.
a. had better
b. may
c. ought
d. are able to
4. It_____ rain this evening. Why don't you take an umbrella?
a. could be
b. must
c. might
d. had better
5. _____ you help me with the homework?
a. May
b. Shall
c. Should
d. Will
6. She hasn't eaten anything since yesterday. She_____ be really hungry.
a. might
b. will
c. must
d. can
7. I put my keys on the table, but now it's gone. Someone_____ have taken it.
a. may
b. had to
c. should
d. would rather
8. Daisy is reading her English test because she has a test tomorrow. She_____ be studying.
a. will
b. should
c. must
d. can
9. We _____ put the fish in the fridge before it spoils.
a. had to
b. may
c. can
d. had better
10. Mr. Brown is very rich. He_____ work hard for a living.
a. mustn't
b. shouldn't
c. can't
d. doesn't have to