prep1-66

66.   (28087-!-item-!-188;#058&003498)

Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.

(A) the estimated population

(B) that of their estimated population

(C) more than the population's estimated amount

(D) more black rhinos than their population estimate

(E) more than that of their population's estimated amount

答案：B

其它 为什么不可以？

请教大家！！

我的答案是a。
怎么会答案不一样呢

错了， A

那为什么b不可以呢

个人意见，

跟OG当中的一道题的表达方式一样：

double the figure for 1977

表倍数的词后面直接加名词，所以CDE的more than不对

B的问题是，主语就是population了，that在指代什么呢？

to be discussed

倍数的表达：1 倍数+ as···as   eg    ten times as big as

                      2 倍数+比较级           eg    ten times  bigger than

                      3 倍数+加内容            eg    ten times the size of

                      4  double triple···

B有錯是否是因為their不知是指誰呢？因為前面並沒有任何複數型態的名詞，請大家多指教囉