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题库 / Prep2007E2-SC-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.
and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of
and apparently this assists flies when they taste the hydrocarbons on prospective mates in distinguishing their own species from those of
which apparently assists flies that taste the hydrocarbons on prospective mates in being able to distinguish their own species from
apparently assisting flies to taste the hydrocarbons on prospective mates to distinguish their own species from those of
apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from
D/E的伴随状语从句视同because状语从句里because的省略
E的结构是assist sb in doing sth，帮助某人做某事，Hydrocarbons assist flies (that taste the hydrocarbons on prospective mates) in distinguishing their own species from others帮助那些品尝伴侣身上的H的苍蝇来区分物种。
D，to do表示状态的转换，help/assist表示帮助，帮助这个动作对事情的发生与否起的是促进作用，不是决定作用，后面不接不定式
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