题目内容：
Earth’s animals are disappearing faster than they reproduce. Because there is too 11 research and too much ignorance, 12 is aware of how much we are losing.Many different kinds of plants and animals 13 extinct. Every year,0.5 percent of the 14 things in the tropical rain forests become extinct. Some disappear 15 they are found and named. No one has time 16 them before they are gone.
The disappearance of species 17 scientists. They want the U.S. Endangered Species Act of 1973 to be made 18 .This act was formed to protect endangered species. 19, land developers,and factory owners disagree. They want changes that will make the act weaker.They think the act is not working. They believe it is not 20 to private landowners. They want the act to consider people more.
11. A.little B.a little C.few D.a few
12.A.anyone B.no one C.someone D.either one
13.A.are becoming B.were becoming C.became D.are to become
14.A.lively B.alive C.living D.live
15.A.as B.after C.until D.before
16.A.study B.to study C.studying D.studied
17.A.interests B.attracts C.worries D.encourages
18.A.better B.larger C. faster D. stronger
19.A.However B.Furthermore C.Therefore D. Though
20.A.enough B. fair C
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