求教第二题

Plants are more efficient at acquiring carbon than are fungi, in the form of carbon dioxide, and converting it to energy-rich sugars.

Plants are more efficient at acquiring carbon than are fungi

Plants are more efficient at acquiring carbon than fungi

Plants are more efficient than fungi at acquiring carbon

Plants, more efficient than fungi at acquiring carbon

Plants acquire carbon more efficiently than fungi

1、A选项中比较结构比较主语时，如果比较对象的谓语动词与主语完全一致时是不是必须省略？记得应该是可以保留，也可以省略

2、BC选项中的状语at acquiring carbon位置应该放在哪里？

C是对的.

GWD的,前人有讨论.LZ可以象第一题那样搜.

以下是引用bret在2006-2-6 17:33:00的发言：
我第一题都没有搜索到啊，请二楼指点如何搜索  谢谢

我记得前人讨论时说是GWD里的.

哪位朋友知道?

acquiring carbon 应该与后面的 converting it to energy-rich sugars并列

所以只能选C,不选A,B

are个人感觉添出来会比较好

请指教

不是吧，这句话是由两个并列分句组成，通过and连接，因此converting前省略了主语plants和谓语are

Plants are more efficient at acquiring carbon than are fungi, in the form of carbon dioxide, and （plants are）converting it to energy-rich sugars

1、印象中状语的位置最好不要改变，因为强调的重心会不同，原句说Plants are more efficient at acquiring carbon than are fungi意思是强调在获得二氧化碳方面效率，我觉得这里不应该改变吧。

2、把at acquiring carbon后置之后成为at acquiring carbon, in the  form of carbon dioxide, 这样的两个介词短语并类的结构是不是合理呢？

请指教

LZ说Plants are more efficient at acquiring carbon than are fungi, in the form of carbon dioxide, and （plants are）converting it to energy-rich sugars

因为如果converting的逻辑主语是Plants,那这儿是没有必要用ING形式的,这里并没有on going的意思.

另外,指出自己的一个错误lants are more efficient than fungi at acquiring carbon,由于这儿有介词存在,所以不应加are,累赘!

请指教

是我错了，best_tu说的对，不应该是and plants are converting it to energy-rich sugars.但是还是没有明白这题：

1、A选项如果变成Plants are more efficient at acquiring carbon than fungi是否正确

2、and之后的converting it to energy-rich sugars是和谁平行