10. You don't have to / mustn't put salt in her
Exercise 3. Mark the letter A, B, C, or D to indicate the correct answer to each of the
following questions.
1. All students
A.should
2. You
wear uniforms at school because it is a rule.
C. ought to
finish your homework before you go to bed.
D. must
B. have to
A. must
B. have to
C. should
D. ought to
3. This drink isn't beneficial for health. You
drink it too much.
A. should
B. ought to not
C. ought not to
D. mustn't
step on the grass.
A. shouldn't
5. I think you
A. must
B. mustn't
C. don't have to
D. ought not to
A. should
B. should
B. have to
C. ought to
pay it back to me next week.
C. must
D. Both B and C
D. mustn't
4. This warning sign indicates that you
do exercise regularly in order to keep your body in good shape.
6. I will lend you some money, but you
7. Hoa
A. has to
A. have to
feed the cats because her mother has done it already.
B. doesn't have to
C. must
show their tickets before entering the concert hall.
C. ought to
spend too much time playing computer games.
8. Those audiences
B. must
9. The children
A. mustn't
10. In case you're
B. ought to not
suffered from the injury, you
B. must
D. Both A and C
D. don't have to
C. shouldn't
see the doctor today.
C. ought
D. Both B and C
D. have better
pay money for your son.
D. don't have to
A. had better
11. Water park is free for kids under 6 years old, so you
A. have to
B. mustn't
12. You look totally exhausted. You
B. ought
A. should
13. Anyone
A. ought to
C. should
take a rest instead of working overtime.
C. must
D. has better
have a passport, even a visa when travelling all around the world.
14. In the peak season, travellers
B. must
B. must
B. had better
A. have to
15. My car broke down yesterday, so I
A. have to
16. We
C. should
D. has to
book their accommodation in advance.
C. should
D. ought
catch a taxi to the office.
C. had to
D. has to
eat as much fruit as possible in order to get enough vitamins for our bodies.
B. should
C. ought to
tell anyone what I've revealed to you. It's still a secret.
D. All are correct
C. ought not to D. don't have to
behave improperly like that.
A. had better
17. You
B. must
A. mustn't
18. If you still want to maintain this relationship, you
A. ought to not
19. When playing or swimming in the pool, children
A. should
B. had better not
B. ought not to
C. mustn't
C. don't have to
D. don't have to
be accompanied by their parents.
D. have to