Even if you are an experienced teacher, you sometimes ______ make some mistakes.
| A．can | B．must |
| C．should | D．will |
We were just about ready to leave _____ it started to snow.
| A．when | B．before |
| C．after | D．since |
_____ the government agrees to give extra money , the theatre will have to close.
| A．Until | B．Unless |
| C．Since | D．While |
Will you deliver, _____ do I have to come to the shop to collect the goods？
| A．and | B．or |
| C．so | D．then |
I firmly believe _____ he said at the meeting was right.
| A．that | B．which |
| C．that what | D．what that |
He imagines that people don’t like him, _____ they do.
| A．and | B．then |
| C．so | D．but |