It took us several hours to make the old man ________ of the safety of travelling by air.
| A．believed | B．convinced | C．informed | D．persuaded |
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 |
I’m glad I went over all my notes; otherwise _____ .
| A．I may have failed | B．I’d fail |
| C．I’d have failed | D．I’ll have failed |
--- “Have you ever been to Beijing?”
--- “No, but I wish I _____”
| A．have | B．will | C．do | D．had |