Question

【题目】 we used to see as something impossible is now becoming a reality.

A. Which B. What C. That D. How

Answer 1

【答案】B

【解析】

考查主语从句。句意：我们过去认为不可能的事情现在变成了现实。此处是主语从句做主语，从句中缺少引导词，且谓语动词see缺少宾语，所填词要其双重作用，故答案为

What。