Doctor Smith has made another wonderful discovery ________ great importance to science.A. which I think is of B. which I think it is of C. that I think is of D. I think which is of

Doctor Smith has made another wonderful discovery ________ great importance to science.
A. which I think is of B. which I think it is of C. that I think is of D. I think which is of

答案A which作is of的主语,I think作插入语时,疑问词放在前面． 查看原帖>>