Question

(2007山東高考，24) ________ worries me the way he keeps changing his mind.

1. A.
   This
2. B.
   That
3. C.
   What
4. D.
   It

Answer 1

D
通過分析句子結(jié)構(gòu)可知，the way...是句子的真正主語，it作形式主語。