The room is in a terrible mess; it __________ have been cleaned.
| A．can't |
| B．mustn't |
| C．shouldn't |
| D．wouldn't |
Jack was very tired _______ he played tennis all afternoon .
| A．if | B．as soon as | C．because | D．before |
______ he finished his work , he left hurriedly.
| A．As soon as | B．As if | C．Unless | D．In order that |
You’ll surly make progress _______ you work with a strong will.
| A．unless | B．until | C．as long as | D．as well as |
_______, I am sure that he is honest.
| A．No matter people say | B．What people say |
| C．Whatever people say | D．It doesn’t matter people say |
It won’t be long _______ you regret what you’ve done.
| A．after | B．before | C．since | D．then |