-Willyouanswerthetelephone?It

问题详情：

- Will you answer the telephone? It ________ be your mother.

       --Sorry, I    . I’m very busy.

    A. can, mustn’t          B. will, can’t     C. may, can’t              D. need, will

【回答】

C

知识点：情态动词

题型：选择题