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
by far 多用来修饰最高级
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."
这个题目的答案没有问题
但是我奇怪的是，ETS为什么在解释中没有提到far 和by far的区别 我的感觉和记忆里 far修饰比较级 by far修饰最高级 请NN确认 | 
