求指点，194

一梦千寻 · 发表于 2011-1-25 11:00:38

Whereas the honeybee’s stinger is heavily barbed and cannot be retracted from the skin, because the yellow jacket has a comparatively smooth stinger, it is therefore able to be pulled out and used again.

A.because the yellow jacket has a comparatively smooth stinger, it is therefore able to be pulled out and used

B.the comparative smoothness of the yellow jacket’s stinger allows them to pull it out and then can therefore use it

C.the yellow jacket’s stinger is comparatively smooth, and can therefore be pulled out and used

D.in comparison, the yellow jacket’s stinger is smooth, and thus able to be pulled out and used
E.in comparison, the yellow jacket has a smooth stinger, thus allowing it to be pulled out and used

(C)

lingzhe · 发表于 2011-4-4 23:10:36

1、看到whereas想对比，主语是stinger，杀ABE
2、C的细微处与前文平行了：comparatively smooth对heavily bared，can对cannot，因此C比D好。

求指点，194

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