The growth of the world’s population and its pressure to resources __1__ threaten to change the quality of life as we know it. It takes __2__ 100,000 years of human existence for the world to reach its 1997population of 5.85 billion people. The increase of 80 million people in 1996 alone is the equivalent of a new U.S population every 3.4years or new Canadian population every 138 days. The UN population Fund predicts that by the year 2050, the world population have __3__ exploded to 10 billion people. This would double in less than a century the already bulging population who existed when it reached __4__ 5 billion in 1987. The chemicals we spew into the air also cause disease.) G8 H2 j& j7 T! H! w8 `
For example, they attack the Earth’s ozone layer, which helps shield the Earth away the Sun’s deadly ultraviolet rays. It is well established __5__ that the ozone layer has thinned considerably during recent decades.Concomitantly, the rate of new cases of the dead skin cancer, __6__ melanoma, has grown dramatically from 1,168 of each 100,000 __7__ Americans to 3,650. This 213 percent increase means that 40,300 Americans diagnosed with melanoma in 1997 and 3,650 died of the __8__ disease. There are some scientists who believe that pollution is even threatening the ability of humans to produce. Chemicals which are __9__ used to make pesticides, plastic, and other products are finding their ways into the human food chain through fish and even through __10__ breast milk.
9 `% n, Y0 I# ]' }5 ?5 R6 o 答案:
3 l9 c* U( ~& _: o 1.to—on。“给……造成的压力”应表述为 one’s pressure on something, 名次pressure通知和介词on搭配。
6 ~# u" Z9 y# j$ a 2.takes—took。句中的时间所指是1997年,所以必须用一般过去时。 r3 Q: ~" f9 [% o: H7 Q
3.popular--^will。这是一个时态问题。时间状语by the year 2050 是一个非常重要的信息,它表示将来的某一个时间点,这时主句应该用“将来完成体”will have done。
3 n6 d8 k+ ?( n3 _ 4.who—that/which。关系分句的先行词是population,尽管population的意思是“人口”,但是它的概念并不是somebody,而是something,所以关系代词应该用that或者which。
& T4 A5 z$ S: E 5.away—from。shield something from something 的意思是“遮挡……使得不受……的侵害”。( r3 P! L v |; K- e& D9 d. Z' C
6.dead—deadly。deadly 表“致命的”。. u9 l" |0 p9 ]1 i' Z4 U
7.each—every.表示频率“每……中有……”,这里应该用every,而不能用each,例如: once every week,不能说 once each week。
1 Z4 `( O m* U+ |. W" Y' v4 T 8.^diagnosed—were.diagnose(诊断)是一个及物动词,可以说be diagnose with/as…例如:
% t7 B$ f+ E+ d3 d/ I; }: a The child has been diagnosed as having flu.
( A+ i" O7 l9 @) a# k7 X" V; U 9.produce—reproduce.produce 的意思是“生产,制造”,reproduce的意思是“生殖,繁殖”。
, Z5 m; t! O3 s 10.ways—way.find one’s way into something 意思是“(设法)走进,进入”。在这个表达中,way只以单数形式出现。这样的词组还有:push one’s way into, work one’s way into, elbow one’s way into等。 |