Question

【题目】---Many people talk about “Didi”. I really wonder ___________________.

--- Just call to order a taxi through it on your mobile phone.

A. how I can use it B. who uses it most

C. why people use it D. what it is used for

Answer 1

【答案】D

【解析】句意：许多人都在谈论“滴滴”。我真的不知道它是用来做什么的。——就是通过它在你的手机上打电话叫出租车。答语中解释了“滴滴”的用途，因此上面的宾语从句是想知道它的用途，故答案为D。