When we got to the park yesterday, ________started raining.
A. that B. it C. this
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? |