再问Prep 40

40. 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 raising 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. 但我认为应该是C.

C明明平行对称：suppliers are  growing fish twice as fast as growing them naturally - 何错之有？怎么可能是D??

C改变了句意原来的意思,

原句意思:供应商培养鱼的速度是鱼自然生长的速度的2倍

C的意思:供应商培养鱼的速度是自然培养鱼速度的2倍

谢谢遥远的绿洲！ETS这道题目出得蛮恶心的。