问题

1–Haven’t you seen Mr.Wilson at the lecture–Yes, but he had left _________ I could askhim any questions.

A: when
B:before
C:after
D: as

正确答案是：

同类题型

I’d like to join the school volunteer project, but I’mnot sure ______.

Do you know where David is He is not in the office.–Well, he ______ have gone far—his coat is still here.

It’s not my blouse. It may be_______________.

His suggestion that she ________ in his home suggested he ________ very warm-hearted.

We’ve decided to decorate our new flat by ______ this weekend.