Question

【题目】I'm sorry. I ________ go now. My mother asks me to be back home before ten.

A. can B. may C. have to D. can't

Answer 1

【答案】C

【解析】

句意：对不起，我必须现在走了，我的母亲让我在10点之前回家。A. can能，会；B. may可以；C. have to必须；D. can't不能。根据下文My mother asks me to be back home before ten.可知上文是说必须现在走了。故选C。