Question

【题目】—Many people talk about "Didi". I really wonder __________.

—You can call to order a taxi through it on your mobile phone easily.

A.that they are used forB.who uses them most

C.what did they use to beD.what they are used for

Answer 1

【答案】D

【解析】

句意：——许多人谈论“滴滴”。我真的想知道他们是用来做什么的。——你用你的手机通过它可以轻松地预定一个出租车。

考查宾语从句辨析。that they are used for 他们被用来做；who used them most 谁用他们最多；what did they use to be 他们过去做什么；what they are used for 他们被用来做什么。根据句子结构，空格处所在句子是一个宾语从句，从句要用陈述句语序，而C选项是疑问句语序，排除C选项。根据下文回答内容“可以通过滴滴预定出租车”，是在讲述滴滴的用法，可知，空格处是在询问滴滴用来做什么的，从句意上排除B选项。A选项中that引导的宾语从句，that无实际意义，不作为任何成分，而be used for后缺少宾语，所以从句用what they are used for。故选D。