问题

You shouldn’t have talked back to our teacher like that. It was awfully impolite.—– You are right. I _________ crazy at that moment.

A:could have been
B:can be
C:must have been
D:should have been

正确答案是：

同类题型

I walked up to the top of the hill with my friends, ________ we enjoyed a splendid view of the lake[ ]

Believe it or not, my sister and I are twins. —-Oh, you must have had the case ________ you were taken for your sister.

Bob, it’s getting cold outside. __________ takea jacket with you—All right, Daddy.

t changeshave taken place in that school. It is no longer ______ it was 20 years ago,_____ it was so poorly equipped.

If itthe climate, I would stay here much longer．