If he ______ it, he _______ it.
| A．had seen; could have believed | B．saw; couldn’t believe |
| C．saw; couldn’t have believed | D．has seen; had believed |
—Did Alan enjoy seeing his old friends yesterday?
—Yes, he did. He __________ his old friends for a long time.
| A．didn’t see | B．wouldn’t see |
| C．hasn’t seen | D．hadn’t seen |
The play had already been on for quite some time when we __________ at the New Theatre.
| A．have arrived | B．arrived |
| C．had arrived | D．arrive |
Professor James will give us a lecture on the Western culture, but when and where __________ yet.
| A．hasn’t been decided | B．haven’t decided |
| C．isn’t being decided | D．aren’t decided |
—Did you see a man in black pass by just now?
—No, sir. I __________ a newspaper.
| A．read | B．was reading |
| C．would read | D．am reading |
I __________ there little more than a week when I set to work with the scientist.
| A．would be | B．have been |
| C．had been | D．will be |