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Many people have been ill from a strange disease these days, _____ we’ve never heard of before.

A. it      B. that         C. one      D. this

9. 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

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

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

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

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

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

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

Many people have been ill from a strange disease these days, _____ we’ve never heard of before.

Many people have been ill from a strange disease these days, _____ we’ve never heard of before.

A．it                B．that              C．one              D．this