Driving a car without insurance can have _____ consequences.
| A．uncertain | B．disastrous | C．potential | D．unworthy |
—Is Mr. Wang still teaching in this school?
—I’m afraid not. He is said _______ the school as he was diagnosed with liver cancer.
| A．to have left | B．to have been left |
| C．to leave | D．to be left |
—Can you tell me what time the flight to Detroit leaves?
—I’m sorry, but it _______________.
| A．has been canceled | B．had been canceled |
| C．has canceled | D．had canceled |
Even if there is no scientific proof secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk.
| A．which | B．that | C．when | D．where |
It is only when you nearly lose someone _____ fully conscious of how much you value him.
| A．do you become | B．then you become |
| C．have you become | D．that you become |
John thinks it won’t be long _________ he is ready for his new job.
| A．when | B．after | C．before | D．since |