问题

I failed in the examination last term and only then ____ the importance of studies.

A:I realized
B:I had realized
C:had I realized
D:did I realize

正确答案是：

同类题型

Mrs. White _____ her wallet now, but she can’t ______ it.

Are you going to leave now —– youwould prefer me to stay here

. —Learning a language isn’t easy. Ittakes time.—I agree. ________. There is no shortcut.

The weather is fine today.______ yesterday.

What do you think of ‘Eat-up’ Campaign (光盘行动)–I think it’s really necessary. It is reported thatthe food that Chinese peopleevery year is enough to feed 200 million people for ayear.