1. 选用方框中短语的适当形式填空

clean up   come up with   cheer up   call up   put up

1. （1） The room is a mess! You'd better it right now.
3. （2） John is really sad. Why don't you try to him?
5. （3） Let's our friends and tell them to meet us outside the theater.
7. （4） There will be a prize if someone the best answer.
9. （5） We could the signs.