Choose the best answer to complete the sentences

IX. Choose the best answer to complete the sentences.
1. You look really tired. You
take a few days off and have a holiday.
d. can
c. have to
take a deep bow as you do in Japan.
c. should
3. Sorry, but my train is at 6.00. I
leave now.
a. shouldn't
b.ought to
c.mustn't
look at other students' work. It's against the rules.
a. shouldn't
b.don't have to
c. mustn't
5. The airline only allows two pieces of luggage. You
a. shouldn't
b. mustn't
a. should
2. In Vietnam, you
a. mustn't
4. You
b. must
b. don't have to
c. don't have to
d. shouldn't
d. have to
d. can't
pack too much!
d. couldn't