单选题
(Witnesses) of the crime (find difficult) to explain (why) they (didn't) call the police.
A、
Witnesses
B、
find difficult
C、
why
D、
didn't
【正确答案】
B
【答案解析】
改为find it difficult。it做形式宾语，真正的逻辑宾语是to explain why they didn’ t call the police。
提交答案
关闭