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1.        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）

(E) while sparing

就是我差了朗文，while好像有做名词，动词。还有就只有连词了。连词不是后面应该接句子的么？那这.....

请教NN解答哦～～

就是我差了朗文，while好像有做名词，动词。还有就只有连词了。连词不是后面应该接句子的么？那这.....

请教NN解答哦～～