reduce vt.& vi.减少，缩小尺寸、数量、价格等

reduce...to...把......减少到......

reduce...by...减少，缩小......程度

be reduced to...沦落为......；迫使......

(1)One of the most effective ways to reduce stress is to talk about your feelings with someone you trust.

减少压力最有效的方法之一是与你信任的人谈谈你的感受。

(2)She reduced her weight by 6 kilos to 40 kilos.

她把体重减到了40公斤，减轻了6公斤。

(3)For some time he was reduced to begging.

有一段时间他沦落到了乞讨的地步。

[单项填空]

(4)-The cars give off a great deal of waste gas into the streets.

-Yes.But I'm sure something must be done to air pollution.

A．reduce B．remove

C．collect D．increase

答案　A

解析　句意为：--汽车将大量废气排到街道上。--是啊。但是我相信，必定要采取某些措施来减少空气污染。reduce减少，降低；remove搬动，移除；collect收集，搜集；increase增加，提高。结合句意可知A项正确。

(5)The population of this city，forty percent of which ， 15% in the last three years.

A．are Germans；has risen by

B．are Germen；has fallen by

C．is German；have increased to

D．is Germans；has been reduced by

答案　A

解析　population常与定冠词the连用，作主语时，谓语动词常用第三人称单数形式；当主