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题库 / Prep2007E1-SC-66
Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.
the estimated population
that of their estimated population
more than the population's estimated amount
more black rhinos than their population estimate
more than that of their population's estimated amount
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B为什么错的呢 是their加上去不简洁吗
that指代前面的population, 就变成 population of their estimated population
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C里面是population和amount比较
比较对象是population！
如果用more than结构的话，应该是 nine times more than that of 2000 in 1997.不知道对不对？
可以。
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in the mid-1970's 这个=in the mid-1970s？？在这里纠结了半天判断哪个是谓语动词
BDE排除了，1970年的犀牛和1997年的犀牛不一样……C哪里错了？是不简洁吗？