Early settlers of the American Southwest grew to realize that the appearance of the California condor (秃鹰) signaled death. The c

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问题     Early settlers of the American Southwest grew to realize that the appearance of the California condor (秃鹰) signaled death. The condor【S1】______on air currents searching for food. His food was the flesh of dead animals. In【S2】______himself, the condor cleaned away dead flesh that would【S3】______spread disease.
    The settlements of the Southwest【S4】______into villages; villages became cities and then【S5】______metropolitan (大都市的) areas. The growth of the metropolis【S6】______but relentlessly (残酷地)【S7】______the area in which the condor--who needed to range freely--could breed and raise young. Farmers’ pesticides (农药) and hunters’ lead bullets found their way into the food chain. Because of the loss of【S8】______and the poisons in the【S9】______, the entire species of condor began to die oat.
    The early settlers realized that the【S10】______of the condor signaled death; they failed to see that their own appearance very likely signaled the death of the condor.

A) environment        B) developed          C) nourishing          D) soared   
E) massive            F) appearance         G) otherwise           H) generally
I) gradually          J) devoting           K) flour               L) diminished
M) territory          N) circumstance       O) moreover
【S4】

选项

答案B

解析
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