53．Many people have been ill with a strange disease these days, we’d never heard of befo——青夏教育精英家教网—

摘要：53．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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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

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

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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