I _____ sooner but I didn’t know that they were waiting for me．
| A．had come | B．was coming | C．would come | D．would have come |
Students should involve themselves in community activities ___________ they can gain experience for growth.
| A．who | B．when |
| C．which | D．where |
It was in the room _________ he was born _________ the meeting was held.
| A．that; that | B．where; that |
| C．which; where | D．where; which |
More than 10,000 competitors from the world came to Beijing to compete __________ each other __________medals in 2008
| A．with; for | B．for; against |
| C．against; with | D．for; with |
Some scientists believe that ________ is no doubt ________ a cure for AIDS will be found.
| A．it; that | B．it; whether |
| C．there; that | D．there; whether |
The teacher asked his students to leave a space in their exercise books ________.
| A．every a few lines | B．each a few lines |
| C．each few lines | D．every few lines |