Everyone knows, perhaps except you, _______ your girl-friend is a cheat.
| A．who | B．which |
| C．that | D．what |
Mike didn’t notice Alice entering his room. He ____ a phone call.
| A．answered | B．has answered | C．was answering | D．is answering |
—Did you find the missing couple in the mountain yesterday?
—No, but we ________ to get in touch with them ever since.
| A．have tried | B．have been trying |
| C．had tried | D．had been trying |
—Such a mistake could have been avoided.
—Unfortunately, he _______ the mistake again and again.
| A．repeated | B．would repeat |
| C．had repeated | D．would have repeated |
—May I remind you that a Mr. Wang is waiting outside, sir?
—Oh, that’s right. I __________ about it.
| A．forget | B．had forgotten | C．forgot | D．have forgotten |
—Did you enjoy your holiday?
—Yes, it’s the best holiday I ___________ these years.
| A．had | B．have had | C．had had | D．would have |