You ______ be polite to the old man.
| A．should | B．can’t | C．might | D．mustn’t |
Kate didn’t go to the movie last night because she had to ___ her sick dog at home.
A. look atB. look up C. care for
Pollution is a serious problem. Scientists have to _____ some good ways to save it.
A. come up withB. come on C. come out
You shouldn’t ________ your hope. Everything will be better.
A. give up B. fix up C. cheer up
_____Daming’s help , they solved the problems successfully .
A.As for B.Thanks for C.Thanks to
The driver saw an old man _______ on the side of the road .
A.lie B.lay C.lying