-Must I take a taxi?-No,you（）.You can take my car.

A. had better to

B. don’t

C. must not

D. don’t have to

A.Good-bye

B.Take care

C.Take it easy

D.What can I do for you

A.had better to

B.don't

C.must not

D.don't have to

A: Should I take some medicine？ B: No, you don't ()to take any medicine.

A. should

B. must

C. need

A.had better to

B.don't

C.must not

D.don't have to

A.had better to

B.don't

C.must not

D.don't have to

A.may not

B.might not

C.needn’t

D.can’t

A.I am afraid I must go. --()

B. Take it easy

C. Go slowly

D. Stay longer

E. See you