26.1) The professor has written another book,_____ of great

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26.1) The professor has written another book,_____ of great importance to computer science.
2) The professor has written another book,_____ of great importance to computer science.
A.which I think it is.B.and I think it is.C.which I think is.D.when I think is
27.1) --- Where do you think _____ he _____ the computer?
--- Sorry,I have no idea.
2) --- Where on earth _____ he _____ the computer?
--- Sorry,I have no idea.
A.had,bought.B.has,bought.C.did,buy.D./,bought.

26题1选C
which引导定语从句,I think是插入部分,is是which引导的定语从句的谓语
2和1一样啊?
27题1,2都选C
do you think和on earth均为插入部分,与题目主干无关；wh特殊疑问词引导的特殊疑问句的结构是：疑问词+一般疑问句,所以排除D.而题目中并没有表示过去某一时间段内发生的事情,不能选B.而had bought是过去完成时,只用于某件事发生在表示过去的过去,限定性很强,也不选.故选C

26.1) The professor has written another book,_____ of great Recently, a professor of philosophy in the U. S. has written The professor has a __books.B.great number of C.great many o Professor Li has a large collection of books,____are written The book is the best _____ has ever been written on the subj he has written a book the name of which i've forgotten中the n 十万火急的英语问题：he has written a book the name of which i have for To our great joy,Professor Liu has been award the A book was written on the subject.He has written a book on t The book is of great ( ), ( )The book was written in1946,_____ the education system ha He has written a book,the name____I have completely forgotte