The river will be dirtier and dirtier________we do nothing to protect them．
| A．since |
| B．if |
| C．unless |
| D．until |
―______ he ______ with us this afternoon?
―Yes, he is.
A. Is, go to skate. B. Does, going to skate C. Is, going to skate
－Would you like to come and cheer Jim on?
－_________
A. Yes, I will. B. Sure. I’d love to. C. Yes. I would.
You can improve your listening skills _____ watching English movies.
| A．by | B．with | C．of | D．in |
______ in the near future, vision-phones will come into wider use in our ____ life.
| A．Maybe, someday | B．Maybe, every day | C．May be, one day | D．Maybe, everyday |
Hey, boys, don’t ______ anything on the boat, take ______ with you.
| A．forget, everything | B．leave, something | C．forget, something | D．leave, everything |