问题描述：
this is the only person __i know in beijing .A who B that
Joe wasn't the only person__got sick during the spread of the disease.A that B who
我们的答案是B 怎么回事？
Joe wasn't the only person__got sick during the spread of the disease.A that B who
我们的答案是B 怎么回事？
问题解答：
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