which I think is important 和 which I think it is important 哪个对 为什么

which ithink is对,还是I think which is对 which I think is 还是which I think it is 哪个对 which I think is important 和 which I think it is important 哪个对 为什么 48.5he made another discovery,___of great importance to sciencea.which i think isb.which i think it isc.which i think itd.i think is I think you English is very good. I think you English very good. which is right He has done a lot of work,___ necessary to our study.A.which I think is B.which I think it is C.I think which is D.which I think is itWhich one?why? He made another wonderful discovery ,____ of great importance to science.（a）A.which I think is B.which I think it is C.which I think it D.I think which is The young scientist made another wonderful discovery,______of great importance to study SARSA.which i think is B.which i think it isC.i think which is D.i think is which He made another wonderful discovery,___of great importance to science.A:which I think is B:which I think it is C:which I think it D:I think which is 选什么, 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 题干He put forward a theory,_______ of great importance to the progress of science and technology.选择一项：a.I think which is b.which I think is c.I think it is d.which is I think The old scientist made another great discovery ,______ of great importance to science.A which i think B which i think is C which i think it is D i think which （ ）He made another wonderful discovery,_______of great importance to scienceA.which I think is B.which I think it isC.which I think itd.I think which is He made another wonderful discovery( ) of great important to science.A.which I think is B.which I think it is C.which I think it D.I think is 英语单选He made another wonderful discovery,_______ ,of great importance to scienceA.which i think is B.WHICH I THink C.which I think it D.I think which 一道英语从句的题； （5）He made another wonderful discovery,___of great importance to science.A which I think isB which I think it isC which I think itD I think which is 求正确答案:He made another wonderful discovery,____of great impoortance to science.A:which ithink is; B:which I think it is; C:which I think it; D:I think which is; That which of these desks is made by me is not important.Which of these desks I made is not imp...That which of these desks is made by me is not important.Which of these desks I made is not important.请问从语法上讲哪个对,还是都对或都