It was _____I met him in Beijing.
| A．two years since | B．two years ago that |
| C．for two years since | D．since two years ago |
We _____ the work on time without your help.
| A．hadn’t had finished | B．didn’t have finished |
| C．couldn’t have finished | D．can’t have finished |
You _____ such a serious mistake if you had followed his advice.
| A．may not make | B．might not make |
| C．shouldn’t have made | D．might not have made |
If only I _____ my watch!
| A．hadn’t lost | B．haven’t lost | C．didn’t lost | D．don’t lose |
What should we do if it _____ tomorrow?
| A．should snow | B．would snow | C．snow | D．will snow |
--- “What will you do during the summer holiday?”
--- “I don’t know, but it’s high time _____ something.”
| A．I’m deciding | B．I’ll decide | C．I decided | D．I decide |