— What did your parents think about your decision?— They always let me do I think I shoul

问题补充：

— What did your parents think about your decision?

— They always let me do I think I should.

A. when

B. that

C. how

D. what

答案：

A. when

B. that

C. how

(答案→)D. what

解析：

试题分析: 句意：——你父母认为你的决定怎样呢？——他们总是让我做我认为应该做的事情。根据结构可知此处是宾语从句，从句缺少宾语，用连接代词，that引导名词性从句不做成分，答案选D。