—Must I go there right now?—No you .You go there before supper.A. mustn't；needB. needn't；

问题补充：

—Must I go there right now?

—No，you .You go there before supper.

A. mustn ；need

B. needn ；may

C. can ；need

D. won ；can

答案：

A. mustn ；need

(答案→)B. needn ；may

C. can ；need

D. won ；can

解析：

Must I．..？肯定回答用Yes，you must.否定回答是No，you needn 或No，you don have to，不能用mustn ，因为mustn 表示“不许；不准；禁止”，本题后半部用may表示允许。