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
答案说this和which不能指代整个前句，this可以理解，但which在非限定定语从句里明确是可以的，这里C就是这样，望指教！！！
BTW，这个prep破解和prep的题号是怎么对应的？作者: greates 时间: 2010-6-21 06:53
