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本题由chris提供
2469 次学习

Laboratory rats and mice live up to 40 percent longer

than usual when fed a diet of at least 30 percent fewer calories than that which they would normally eat, but that otherwise contains all necessary vitamins and nutrients.


    A. of at least 30 percent fewer calories than that which they would normally eat, but that otherwise

    B. with at least 30 percent fewer calories than what they would normally eat though otherwise it

    C. that has at least 30 percent fewer of the calories that they would normally eat, but otherwise it

    D. that has at least 30 percent fewer calories than they would normally eat but that otherwise

    E. that has at least 30 percent fewer calories than that which they would normally eat, though that

    otherwise


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答案:
D

个人看法

:E主要错在that which。that既然已经相当于diet了,后面就没必要再加which了。其次,如果though前面加了一个逗号,那后面这个though引导的让步状语从句就有错误修饰前面“laboratory rats and mice...整个句子的风险,因此E不对。

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