The doctor looked ______ the old man ______.
| A．at…care | B．over…careful |
| C．up…carefully | D．over…carefully |
It’s cold outside, you’d better not _____ out.
A. to goB. go C. going
Why _______ climb mountains this weekend?
A. don’t B. didn’t C. not
There _______ a school sports meet next weekend.
A. is going to have B. isC. is going to be
As we know, water is very important _______ us.
A. of B. to C. on
Would you mind _____ the room?
A. cleanB. cleaning C. to clean