Question

【题目】I reall y don't know ______ this question.

A. which to do B. which to answer C. what to do D. how to answer

Answer 1

【答案】D

【解析】句意：我真不知道如果回答这个问题。which to do做哪一个；which to answer回答哪一个what to do做什么。how to answer如何回答。此处有宾语question，故不用疑问词what,which。故选D。