Question

It worried her a bit _____________ her hair was turning grey.

  A. which     B. that    C. if    D. for

Answer 1

B

解析:

主要测试主语从句。分析句子结构可知句子中用了形式主语it，句子的译文为：她的头发逐渐变白让他非常担心。答案为B。