河南成教 / 英语(二)
正确率：100%
8、
A. haven't heard
B. haven't heard of
C. not to have heard of
D. not having heard of
When asked to give his opinion on the failure of file experiment, he pretended _ _ _ _ _ _ it.
A. haven't heard
B. haven't heard of
C. not to have heard of
D. not having heard of
参考答案：
佳题速递：