— Don’t worry. Mum will come to solve the problem.—she won’t come?A. Why notB. What about

问题补充：

— Don’t worry. Mum will come to solve the problem.

—she won’t come?

A. Why not

B. What about

C. What if

D. How about

答案：

A. Why not

B. What about

(答案→)C. What if

D. How about

解析：此题考查固定短语what if 的用法。表示如果…该怎样办。此句的意思是如果她不来怎么办。