求教GWD22的几个语法题~是神马PP上的，找不到~求亲们解答

筱霏1990

The yield per acre of coffee berries varies enormously in that a single tree, depending on both its size and on climate and altitude, could produce enough berries to make between one and twelve pounds of dried beans a year.



A.enormously in that a single tree, depending on both its size and on climate and altitude, could produce

B.enormously in that a single tree, dependent on its size and also on climate and altitude, is able to produce

C.enormously, because a single tree, depending on its size and on climate and altitude, is able to produce

D.enormously, because a single tree, being dependent on its size, climate, and altitude, is capable of producing

E.enormously, because a single tree, dependent both on its size as well as on climate and altitude, could produce

这题选C  不选B是因为dependent的问题咩~~形容词要用BE动词？

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 tastes 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

---------------------------------------------------------------
这题选E，可是副词不是不能直接引导的么，应该加连词啊！！

If current trends continue, by the year 2010 carbon emissions in the United States
will soar to a level more than one-third higher than were those in 1990, according to official projections.

A.will soar to a level more than one-third higher than were those

B.will soar to a level more than one-third higher than that

C.would soar to a level more than one-third higher than is was

D.would soar to a level more than one-third higher than those

E.would soar to a level more than one-third higher than they were



么有懂这个时态