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
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
C
考查指示代词，这里用one指代前面的a strange disease，充当同位语。