The rivers will become dirtier and dirtier ______ we take action to protect them.
| A．since | B．if | C．until | D．unless |
Some people won’t realize the value of their health ________they lose it.
| A．after | B．until |
| C．as | D．when |
Jackie Chan played the lead role ______an excellent policeman _____the film.
| A．for, of | B．of, of |
| C．of, in | D．of, for |
This programme is a___________ TV show, so you can send text messages directly to the station to vote for your favourite singer.
| A．lively | B．live |
| C．alive | D．living |
It’s quite warm here, we_________ leave the stove on .
| A．couldn’t | B．wouldn’t |
| C．mustn’t | D．needn’t |
--Did your parents go to see a film called The World of Dinosaurs last night?
---No. We______ stayed at home watching TV.
| A．all | B．both |
| C．none | D．either |