---What is that? Is it an English learning machine?
---Yes. It ________ us to improve our English.
A. is used for helping B. used to help C. used to helping
—I saw Mr Smith in the office at ten yesterday morning．
—That’s impossible．He________an English party with us then．
| A．has |
| B．had |
| C．was having |
| D．has had |
________I was in the US，I made a lot of American friends．
| A．While |
| B．Although |
| C．Unless |
| D．Until |
—I don’t know________．
—Because he has to look after his mother．
| A．why he is leaving |
| B．why is he leaving |
| C．whether he is leaving |
| D．whether is he leaving |
She________to an English program while her parents________TV．
| A．was listening；is watching |
| B．listened；were watching |
| C．was listening；watched |
| D．was listening；were watching |
—I didn’t see you at the beginning of the party last night．
—I________on nay biology report at that time．
| A．worked |
| B．work |
| C．was working |
| D．am working |