One-third of the area _____ covered with trees. About seventy percent of the trees _____ been planted recently.
| A．is; have | B．is; has |
| C．are; have | D．are; has |
I’ll go to the party with you ____ you don’t wear those strange trousers.
| A．as though | B．in order that |
| C．in that | D．on condition that |
-I need to put a cross on the map to show ____ that famous hotel is.
-____? Mary’s done it already.
| A．where; Why bother | B．wherever; How come |
| C．what; What for | D．whatever; So what |
When ____ to danger and conflict, men tend to increase blood pressure, ____ nervous or anxious.
| A．exposed; felt | B．exposing; felt |
| C．exposed; feeling | D．exposing; feeling |
-Why are you still here? Everybody has gone to attend the lecture by the president.
-Oh, I ____ about it!
| A．didn’t inform | B．hadn’t been informed |
| C．haven’t informed | D．wasn’t informed |
I don’t think David could have done such a stupid thing last night, ____?
| A．did he | B．didn’t he |
| C．do I | D．don’t I |