问题
选择题
---What do you think worries him so much? ----____.
A．He didn’t pass the exam
B．His father is seriously ill
C．Lost his bike
D．What Jim said just now
答案
答案：D
上句的意思为：你认为什么使他如此的担忧？可知是对主语进行提问。从四个选项中看出，只有D能做主语，用what引导的名词性从句做主语，完整形式为What Jim said just now worries him so much.所以选D。