Something must be done to prevent factories sending out poisonous gases so as to
题型：不详难度：来源：
Something must be done to prevent factories sending out poisonous gases so as to keep the city _________.
A polluting B. from polluting C. pollute D. from being polluted |
答案
| D |
解析
| 考查动词搭配。keep … from doing sth.阻止某人做某事，根据句意是阻止城市被污染，故用被动，选D。 |
举一反三
Although ________ to stop, he kept on working.| A．tell | B．telling | C．having told | D．told |
|
—You seemed to be nervous.
—Oh,with so many watchers________around,how could I keep calm?| A．standing | B．stood | C．to stand | D．stand |
|
The Japanese people keep up cheerful spirits ________ the world that they can get over the crisis caused by the terrible tsunami（海啸）.| A．being convinced | B．convinced | C．to convince | D．having convinced |
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When ____ to feel unworthy, children often work extra hard to please their parents．| A．to make | B．making | C．made | D．having made |
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Jane established a program, ____ young people to take part in activities ____ promote greater concern for the environment．| A．to encourage; where | B．having encouraged; where | | C．encouraging; that | D．encouraged; which |
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