问题

It is obvious to the students ______ theyshould get well prepared for their future.

A:as
B:which
C:whether
D:that

正确答案是：

同类题型

It ____ we had stayed together for a couple of weeks ____ I found we had a lot in common

Next Monday is my birthday.—Is that so ______

－Mylittle brother was really_______ at the _______ news.

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