A-A+
(Witnesses) of the crime (find difficult) to e
问题详情
(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
参考答案
正确答案：B
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。
