Many people have been ill from a strange disease these days,______we’ve never heard of before.
A. one B. that C. it D. this
A
解析:
one作同位语，指代前面的disease。
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Many people have been ill from a strange disease these days,______we’ve never heard of before.
A. one B. that C. it D. this
A
one作同位语，指代前面的disease。
