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
网友回答
A. it
B. that
(答案→)C. one
D. this
解析：考查代词。A. it 代指同类同物B. that 特指上文的可数名词单数，或不可数名词，C. one 泛指上文的可数名词单数，D. this指代下文：one是指代词，指代a strange disease，用作同位语。句意：最近很多人得了奇怪的病，一种我们以前从没听过的病。选C。