Some of you may have finished unit one._____; you can go on to unit two.
| A．If you may | B．If you do | C．If not | D．If so |
Even if the treatment_______, there is still no magic medicine for patients in the late stages of all AIDS.
| A．does |
| B．uses |
| C．works |
| D．helps |
We hope that you can _______ practical ideas to deal with this problem.
| A．come up |
| B．come up with |
| C．come about |
| D．come out |
The electricity was cut off by the storm, and thus all the lights_______.
| A．were turned off |
| B．went out |
| C．went in |
| D．were turned on |
_______me, he walked up to me, smiling.
| A．To , see |
| B．For seeing |
| C．On seeing |
| D．Because seeing |
--- I regret_______ you John has been fired.
--- I can hardly believe my ears. He is such a fine worker.
| A．telling |
| B．having told |
| C．to tell |
| D．to have told |