补充250-175

ccfish

175.    Doctors still know little about how the Listeria bacterium is spread and why the disease it causes, listeriosis, afflicts some people in a contaminated area though it spares many others.
(A) though it spares
(B) where it spares
(C) despite sparing
(D) when sparing
(E) while sparing

key:E, A有什么错？是E比A简洁吗？

欧阳可情

以前讨论过的：）http://forum.chasedream.com/dispbbs.asp?boardID=23&replyID=206035&ID=27955&skin=1
你去固顶的帖里250提问回答看看，会有你要的东西