I was so familiar with him that I recognized his voice _____ I picked up the phone .
| A．while | B．after |
| C．in case | D．the instant |
Seeing the enemy, Gary was behaving as though nothing __________.
| A．happened |
| B．had happened |
| C．would happen |
| D．was happening |
It is no good __________ him to see you off.
| A．to expect |
| B．expecting |
| C．of expecting |
| D．for expecting |
—The light in the office is still on.
—Oh，I forgot __________.
| A．turning it off |
| B．turn it off |
| C．to turn it off |
| D．having turned it off |
She pretended __________ me when I passed by.
| A．not to see |
| B．not seeing |
| C．to not see |
| D．having not seen |
Sometimes customers can't help __________ the things they don't re-ally need.
| A．persuading to buy |
| B．to be persuaded into buying |
| C．being persuaded to buy |
| D．to persuade into buying |