2. 外语
  3. In the United States, the 【C1】______ to protect plant and animal 【C2】______ has become a 【C3】______ controversial and 【C4】______

In the United States, the 【C1】______ to protect plant and animal 【C2】______ has become a 【C3】______ controversial and 【C4】______

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问题    In the United States, the 【C1】______ to protect plant and animal 【C2】______ has become a 【C3】______ controversial and 【C4】______ political issue since the 【C5】______ of the Endangered Species Act in 1973. The act, 【C6】______ to protect species’ living areas, and policies that 【C7】______ land and forests compete with economic interests. In the 1990’ s, for example, the woodcutters in the Western United States were 【C8】______ legally in their 【C9】______ to cut trees for timber in the Cascade Mountains. The challenge was 【C10】______ to protect the endangered spotted owl, whose remaining population occupies these forests and 【C11】______ the intact, ancient forest for survival. The problematic situation set the interests of environmentalists 【C12】______ those of corporations and of individuals who 【C13】______ to lose jobs. After months of debate and legal battles, the fate of the woodcutters-and the owls was still undecided in mid-1992.
   Similar 【C14】______ exist between the developed and the developing nations. Many people in industrialized nations, for example, believe that developing nations in tropical regions should do more to protect their rain forests and other natural areas. But the developing countries may be 【C15】______ , with populations growing so rapidly that using the land is a 【C16】______ to temporarily avoid worsening poverty and starvation.
   Many of the changes to Earth that 【C17】______ scientists have the potential to 【C18】______ the planet of its biological richness. The destruction of Earth’ s ozone layer, for example, could 【C19】______ to the general process of impoverishment by allowing ultra-violet rays to harm plants and animals. And global warming could 【C20】______ species unable to quickly adapt to changing climates. Clearly, protecting will come only through coordinated international efforts to control human population, stabilize the composition of the atmosphere, and preserve intact Earth’ s complex web life.  
【C8】______
选项 A、confronted
B、defied
C、challenged
D、questioned
答案C
解析 表示“被质疑”，是较为正式的用法。
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