问题补充:
The two girls are so alike that strangers find difficult to tell one from the other. (·山东,24)
A. it
B. them
C. her
D. that
答案:
A. it
B. them
C. her
D. that
解析:A
解析句意为:这两个女孩长得如此相像,以致于陌生人觉得很难把她们区分开。本句中it用在find后作形式宾语,真正的宾语是后面的动词不定式短语to tell one from the other。them,her,that等词均不能作形式宾语或形式主语。