We need to ________ the problem in time
—we can’t leave it till tomorrow．
| A．read | B．work |
| C．solve | D．attack |
There’s no light on—theybe at home.
| A．can’t | B．mustn’t |
| C．needn’t | D．shouldn’t |
Jim is always so busyhe has little time for his family.
| A．if | B．until |
| C．that | D．which |
I asked two students the way to the post office, butof them knew.
| A．both | B．either |
| C．none | D．neither |
—It’s so hot today. What about going swimming?
—!
| A．Never mind | B．Good idea |
| C．You’re welcome | D．Don’t worry |
— Are you willing to live on Mars one day?
— It sounds exciting,but it still worries me.
| A．Of course I am. | B．I’m not sure. |
| C．Why not? | D．Are you joking? |