243. Some scientists have been critical of the laboratory tests conducted by the Federal Drug Administration on the grounds that the amounts of suspected carcinogens fed to animals far exceeds those that humans could consume.
(A) far exceeds those that humans could consume
(B) exceeds by far those humans can consume
(C) far exceeds those humans are able to consume
(D) exceed by far those able to be consumed by humans
(E) far exceed those that humans could consume
Choice E is best. The plural verb exceed agrees in number with its subject, amounts, and the phrase those that humans could consume conveys the intended meaning clearly and without unnecessary wordiness. In choices A, B, and C, the singular exceeds does not agree in number with its plural subject, amounts. Choices B and C omit the conjunction that _an omission that is grammatically acceptable, but in the case of this sentence diminishes clarity. In D, the use of the passive voice in the phrase those able to be consumed by humans is unjustified, as it increases wordiness while stating the meaning less precisely: it is accurate to call humans "able,' but not to call those [amounts] "able."
D和E的区别是一个使用了主动,一个使用了被动,ETS对D的解释我不是很清楚 those 指代 the amount...那D和E有什么区别?什么叫humans able/amounts able?
顶~~
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