?May I use your bike?

? ________.

A. Yes, you must

B. No, you mustn't

C. No, you needn't

D. No, you may not

?Must we do our homework now?

?________ .

A. Yes, you can't

B. No, you needn't

C. No, you may

D. Yes, you mustn't

--May I park my car here ,Sir ?

--____ , You may park it over there .

A. Yes , you may B. Yes ,you do

C. No, you needn’t D. No, you mustn’t

－Shall I book some seats for the concert?

－____. I've already done that.

A. Yes, you may

B. No, you mustn't

C. No, you needn't

D. I'd rather not