2. 外语
  3. The number of mountain gorillas is declining with such rapidity that the population is one-half in the twenty years between a co

The number of mountain gorillas is declining with such rapidity that the population is one-half in the twenty years between a co

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问题 The number of mountain gorillas is declining with such rapidity that the population is one-half in the twenty years between a count made by George Schaller in 1960 and the one made by Dian Fossey in 1980.
选项 A、with such rapidity that the population is one-half
B、with such rapidity that the population was one-half
C、so rapidly the population divided in half
D、so rapidly that the population was halved
E、in such rapidity that the population is halved
答案D
解析 修饰动词declining用rapidly显然要比用with rapidity好得多，且符合习惯，排除A、B、E；且A、E中一般现在时是不对的；同时is(was)one half这个表达是不明确的，不如washalved准确，即“减半”。
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