真题练习

961.It was never clear _______ the man hadn't reported the accident sooner.

A.that
B.how
C.when
D.why

962.His writing is so confusing that it's difficult to make out _____ it is he is trying to express.

A.that
B.how
C.who
D.what

答案解析

961.答案是D;记住另一句型:It is clear that…特别注意连接词的正确使用。
962.答案是D;其中what引导宾语从句，且充当express的宾语。