问题

You ought to havecalled him yesterday ．— Yes，I know I________.

A:is invited
B:have to
C:should have
D:must have

正确答案是：

同类题型

It was __________ computer games that costthe young man a lot of precious time that heshould __________ on his lessons．

Excuse me, is this seat taken—_______ . That man got his books and left a few minutes ago.

I bought two film tickets yesterday, ___________ I paid $40

________________, the experiment is sure to succeed.

What _________ interesting subject it is!