—Tom looks very sad. What’s wrong _______ him?
—An accident happened _______ his father this morning.
| A．to; with | B．with; to |
| C．for; to | D．with; for |
I wonder if he tonight. If he, I’ll let you know.
| A．will come; will come | B．comes; comes |
| C．will come; comes | D．comes; will come |
- The air pollution is terrible.
- It will be worse ________ we take action to protect the environment.
| A．if | B．unless | C．until | D．when |
______ he talked with her for a long time, he failed to convince(说服)her.
| A．Though | B．But | C．Since | D．As |
Mr Smith usually reads a newspaperhe’s waiting for the bus.
| A．if | B．the | C．because | D．while |
Many teenagers think they ____ to play computer games on weekends.
| A．were allowed | B．should be allowed |
| C．are allowed | D．will be allowed |