Human beings experience problems __15__light pollution too.Light affects some chemicals in people’s bodies.And people who are continually __16__ to light at night have higher rates of health problems.
People and animals need light,__17__ they also need darkness.Experts say that people must use light __18__.Only use the amount of light that you __19__.Don’t think that more light is better light.People also can greatly __20__ light pollution by using welldesigned lights,which only shine light where it should be.Using less light and better lighting decisions reduces the energy people use.
【解题导语】 本文是说明文。文章介绍了光污染的危害以及应对措施。
1.A.Therefore
B.Besides
C.However
D.Meanwhile
解析:选C。见下题解析。
2.A.cars
B.computers
C.television
D.electricity
解析:选D。根据上文的it was common to see many stars和下文的using more lights,most people in urban areas will never see beautiful groups of stars可知,“然而(However)”,随着“电(electricity)”的发明,这一切发生了改变。
3.A.special
B.natural
C.dark
D.big
解析:选B。由于到处都是光源,人们再也看不到“自然的(natural)”星空。
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