Must I hand in my exercise book now Mr. Zhao? - No you . You may give it to me tomorrow.

问题补充：

Must I hand in my exercise book now, Mr. Zhao?

- No, you . You may give it to me tomorrow.

A, needn’t B. mustn’t C. can’t

答案：

解析：must构成的一般疑问句否定回答通常用needn’t或don’t have to，故本题选A。