14. A. You must study hard
B. You must cheating in the exam
C. You must copy your friend’s homework
D. You must studying when you’ll have examination
15. A. You mustn’t be diligent
B. You must be diligent
C. You must be lazy
D. You must confident
16. A. must not cheat
B. must trust your friend
C. must not do the best
D. mustn’t be too serious
Dialog for no. 17-18.
Nana: I want to be healthy but I like eating fast food. I can’t go diet.
Rina: I think you ___(17)___have diet, to be healthy ___(18)___ eat more fruits and vegetables.
17. A. should
B. should not
C. Should be
D. shouldn’t be
18. A. Should
B. Should not
C. Should be
D. Shouldn’t be