was most important to her was her family.A. WhatB. WhichC. AsD. It

问题补充：

was most important to her was her family.

A. What

B. Which

C. As

D. It

答案：

(答案→)A. What

B. Which

C. As

D. It

解析：本题考查主语从句。主语从句中缺少主语，故用what。