请教一道新powerprep 的难题

smilingtracys

To meet the rising marketing demand for fish and seafood, suppliers are growing fish twice as fast as their natural growth rate, cutting their feed allotment by nearly half and rasing them on special diets.

A. their natural growth rate, cutting their feed allotment

B. their natural growth rate, their feed allotment cut

C. growing them naturally, cutting their feed allotment

D. they grow naturally, cutting their feed allotment

E. they grow naturally, with their feed allotment cut

答案是D. 但是D中的比较明显不平行.

而这里我也只能选C, 尽管c的代词用的不好.

这里先多谢了

smilingtracys

ok,知道了. 谢谢大家帮忙.

不过这种代词的用法还真是容易让人选错啊.

friend_friends

注意明确naturally只能是修饰fish grow

此处的they是代fish,而非supplier

alice2292

they grow naturally是一般的情况用一般现在时. 不能用现在进行时

moodraie

逻辑应该不会有问题的

To meet the rising marketing demand for fish and seafood, suppliers are growing fish twice as fast as growing them naturally

省略了主语而已啊.

tulipmontreals

相比之下，只有选d了。

c的growing them有问题，them指代fish.逻辑意思有问题。