Question

【题目】The two girls are so alike that strangers find __________ difficult to tell one from the other.

A. it

B. them

C. her

D. that

Answer 1

【答案】A

【解析】句意：这两个女孩长得如此相像以至于陌生人发现很难把她们区分开来。在that引导的结果状语从句中，谓语动词find 的真正宾语是to tell one from the other ,设空处需要形式宾语，而四个选项中只有it可以作形式宾语，所以选择A项。