A-A+
They found the lecture hard ______.A.to unders
问题详情
They found the lecture hard ______.
A.to understand
B.to be understood
C.to have been understood
D.to have understood
参考答案
正确答案:A
解析:动词不定式在difficult,easy,fine,hard,impossible,nice等形容词后出现的不定式只能用主动式。本题正确答案为A。