– Must I stay here with you?-- No you . You may go home but you go to the net bar(网吧).A

问题补充：

– Must I stay here with you?

-- No, you . You may go home, but you go to the net bar(网吧).

A. mustn’t; needn’t

B. needn’t; mustn’t

C. must; need

D. need; must

答案：

A. mustn’t; needn’t

(答案→)B. needn’t; mustn’t

C. must; need

D. need; must

解析：must必须，一定。Mustn’t禁止，一定不；need需要；needn’t不必。句意：我必须和你呆在这儿吗？——不，你不必。你可以回家。但是你一定不要去上网。Must的否定回答，一般借助于needn’t和don’t have to，表示不必的含义，结合语境可知选B。