In many areas in the world ecosystem is ________, leading to global warming and many natural disasters.
A.interrupted B.disturbed
C.troubled
D.upset
答案:B
6.reduce vt.缩减,减少;降低,使……陷入某种地步
●用法拓展
reduce sth. to...减少到……
reduce sth. by...减少了……
reduce sb. (from sth.)to sth.降职
reduce sb./sth.(from sth.)to sth.=be reduced to...
使某人或者某物陷入某种(通常指更坏的)状态或状况中。(常用于被动语态中)
①Now the cost of a bike has been reduced from 80 dollars to 50 dollars.
现在一辆自行车的成本已从80美元降至到50美元。
②The number of smokers there is said to have been reduced by 30%.
据说那里的吸烟人数已减少了30%。
③Life in the city was hard and many people were reduced to begging on the streets.
城市生活非常的艰难,许多人都沦落到沿街乞讨的地步。
④The reform has reduced us to servants of the state.
这一改革把我们都降为公务员了。即境活用单项填空
—The cars give off a great deal of waste gas into air.
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