Many people have been ill with a strange disease these days, we’d never heard of before.A

发布时间：2020-08-17 14:38:12

Many people have been ill with a strange disease these days,      we’d never heard of before.
A. one
B. that
C. it
D. this

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(答案→)A. one
B. that
C. it
D. this
解析：考查代词。one表泛指，在这里作a strange disease的同位语。
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