— Do you mind my smoking here?
— Look at the sign. It says “No Smoking”.
A. Of course not.
B. No, I don’t.
C. You’d better not.
—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 |
The girl was flying a kite________her father came back．
| A．when |
| B．while |
| C．until |
| D．after |
—I went to see you yesterday evening．But you weren’t in．Where were you then?
—I’m sorry．I________a walk by the lake with my classmates．
| A．am taking |
| B．was taking |
| C．take |
| D．took |
While we________about Mr.Wang in the classroom，he came in．
| A．talked |
| B．are talking |
| C．were talking |
| D．talk |
I was doing my homework________my father was reading newspapers．
A．how
B．while
C．if