问题详情

　　Protecting the Few

　　How we live our lives affects the environment. The environment is all thethings around you. All across Earth, humans are __31__the environment in smalland large ways. We cut down trees to build houses. We plow fields to__32__crops. We pour waste into rivers, lakes and oceans. We use larger nets andbigger boats to catch __33__number of fish. Activities like these affect plantsand animals. They __34__affect things like the soil and water.

　　Sometimes our actions make the number of a __35__plant or animal getlarger. For example, if you planted roses in your yard, these would be moreroses in your area.

　　Our activities can also __36__to a smaller number of plants and animals. Ifa park were turned into an apartment building, what would happen to the plantsand animals there？Well, they would __37__die or move to other __38__. Therewould be fewer plants and animals.

　　Pollution and other activities sometimes cause the number of aspecies(物种)to become so __39__that it cannot survive. A species that is in__40__ of dying out is called an endangered(濒危的) species.

A .changing
E. huge
I. huge

B. grow
F. places
J. places

C. lead
G. certain
K. survival

D. either
H. also
L. danger