Question

【题目】No matter what happens，be sure you always do you think is your duty.

A. what B. which

C. that D. how

Answer 1

【答案】A

【解析】句意：无论发生了什么事，你一定要确保总是去做你认为该做的事。do后面所接的是宾语从句，you think可视为插入语，而该宾语从句中又缺主语，该主语既不指人也不指哪一个，所以只能用what。故选A。