150。Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important in courtship, and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of others.
(A) and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of
(B) and apparently this assists flies when they taste the hydrocarbons on prospective mates in distinguishing their own species from those of
(C) which apparently assists flies that taste the hydrocarbons on prospective mates in being able to distinguish their own species from
(D) apparently assisting flies to taste the hydrocarbons on prospective mates to distinguish their own species from those of
(E) apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from
D。assist习语搭配不正确；选项改变了原句的动受关系：to taste作assist的受词，to distinguish作taste的受词，完全改变了句子意思；those没有指代对象，即使改为that，也不正确
错选D，正确为E。看解释已明白those of不正确。仍然困惑的是关于 to do的问题。to taste作assist的受词，to distinguish作taste的受词，完全改变了句子意思，这句解释有些不明白。为什么完全改变了句子意思。。。
求指教。多谢。
单纯讨论to do与that用法区别的问题，再问一例
147。Australian embryologists have found evidence that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolved as a kind of snorkel.
(A) that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolved
(B) that has suggested the elephant descended from an aquatic animal, its trunk originally evolving
(C) suggesting that the elephant had descended from an aquatic animal with its trunk originally evolving
(D) to suggest that the elephant has descended from an aquatic animal and its trunk originally evolved
(E) to suggest that the elephant is descended from an aquatic animal and that its trunk originally evolved
为什么这里用to do 而不用that...
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