—Must I clean my room now Mum?—. You can do it tomorrow.A. No you needn’t B. No you mus

问题补充：

—Must I clean my room now, Mum?

—. You can do it tomorrow.

A. No, you needn’t

B. No, you mustn’t

C. Yes, you need

D. Yes, you must

答案：

(答案→)A. No, you needn’t

B. No, you mustn’t

C. Yes, you need

D. Yes, you must

解析：句意：妈妈，我现在必须打扫我的房间吗？联系下文，你可以明天做。可知上文为否定回答。must的否定式一般借助于needn’t和don’t have to构成。故选A。