______ halfway through the exercise, the teacher changed his mind and collected all our papers.
| A．When only being | B．When we were only |
| C．Being only | D．Having been |
The young man insisted that he _____ nothing wrong and _____ free.
| A．did; set | B．had done; should be set |
| C．should do; be set | D．had done; must be set |
He is talking so much about America as if he _____ there.
| A．had been | B．has been | C．was | D．has gone |
She made the demand that the journalists _____ at once ______ Iraq.
| A．leave; for | B．leave; to | C．left; to | D．to be left; for |
The teacher demanded that the exam _____ before eleven.
| A．must finish | B．would be finished | C．be finished | D．must be finished |
You promised your friend a letter; you ought to ______ days ago.
| A．write | B．be writing | C．have written | D．be written |