Your sister works very hard ,and .
| A．so you are | B．so you do | C．so are you | D．so do you |
—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? |
The shop owner suddenly stopped talking with his mouth like a big “O”. It was the President!
| A．tight closed | B．tightly closed |
| C．wide open | D．widely open |
—Has David finished his project yet?
—I guess not. He on it at lunchtime. Do you want me to confirm it?
| A．is working | B．was working |
| C．has worked | D．had worked |
I hope the train will arrive on time, but it’s my control.
| A．within | B．without |
| C．under | D．beyond |