21．The moment we heard the news of the earthquake, we began to ________ the work to rescue those who were trapped in the building.
| A．set off | B．set down | C．set aside | D．set about |
Don’t turn round .Go______ on till you see the hospital.
| A．down | B．alone | C．ahead | D．straight |
When I got there, the meeting _____ for ten minutes.
| A．has been on | B．had begun | C．had been on | D．has begun |
At this time next week we ___________ a football match against Class 9.
| A．are going to play | B．will be playing | C．will play | D．are to play |
—I haven’t heard from Henry for a long time.
—What do you suppose________ to him?
| A．will happen | B．has happened | C．was happening | D．had happened |
The manager promised to keep me_______ how our business was going on.
| A．informing of | B．informed of | C．to inform of | D．on informing |