The number 9.11 is a special number, , I think, that will be remembered by the Americans forever.
A. what
B. it
C. which
D. one
网友回答
A. what
B. it
C. which
(答案→)D. one
解析:句意:9.11是个特殊的数字,我认为这个数字能被美国人们永远记住。这里one是number的同位语,I think是插入语,that引导的是定语从句,其他的词不能做同位语,故选D。