Pollution is a serious problem. Scientists will _______ some good ways to save it.
| A．come up with | B．come on |
| C．come out | D．come up |
---I find the more we study, the more difficulty we have ________ out Maths problems.
---Oh, I agree with you. Maths is more and more difficult.
| A．worked | B．work | C．works | D．working |
---What a mess(杂乱)! Tony, you should ___________ your things to keep the room clean.
---OK, Mum! I’ll do it at once.
| A．put up | B．put on | C．put away | D．put out |
---Where was your sister at this time yesterday evening ?
---She was writing an e-mail ______ I was watching TV at home.
| A．after | B．as soon as | C．while | D．until |
--- Would you like black or white coffee?
--- Well, I ______ coffee ______ milk.
| A．prefer ; to | B．prefer; with | C．would rather; than | D．like; better |
The 16th ______ Games will be held in Guangzhou, we’ll watch the ______ opening ceremony on TV on November 12th.
| A．Asia, live | B．Asian, live | C．Asia, alive | D．Asian, alive |