第一次发帖求助各位前辈 PREP 2007 第6题 疑问已解答 谢谢大家！

edwardbella

6.    

The list of animals that exhibits a preference of either using the right or the left hand (i.e., claw,
paw, or foot) has been expanded to include the lower vertebrates.

(A) exhibits a preference of either using the right or the left hand (i.e., claw, paw, or foot) has
been expanded to include
(B) exhibits the preference to use either the right or the left hand (i.e., claw, paw, or foot) has
been expanded and includes
(C) exhibit a preference in either using the right or the left hand (i.e., claw, paw, or foot) has
been expanded to include
(D) exhibit a preference for using either the right or the left hand (i.e., claw, paw, or foot) has
been expanded to include
(E) exhibit the preference as to either using the right or the left hand (i.e., claw, paw, or foot) has
been expanded and includes  

PREP语法解释：
(C) either using the right or the left hand结构不平行
(D)    正确,    注意到了两个地方的主谓一致;the right和the left平行且使用to include避免了B选项的
错误

我就是不明白为什么C不平行，D就平行了？？

bobdog159

C选项 either using the right or USING the left hand这才平行

edwardbella

原来如此，多谢多谢