问题

Bob could have seen the famous pop star ______yesterday morning.

A:did he come
B:if he came
C:had he come
D:if he shouldcome

正确答案是：

同类题型

24．The first time I met David in the Central Park, both of us felt that we_____each other for ages

The bottle is full _______milk.Who has filled it_______milk

We’d better_______ if we want to be on time．—OK．

Should I wear a suit for the concert tonight–No , you ________. It is not as serious as the one we went to last week .

Our teacher has a _____ for thinking up ways _____ his speeches attractive.