1.The young scientist made another wonderful discovery,＿of great importance to study SARS.
A.which I think is B.which I think it is
C.I think which is D.I think is which
2.-May I look at the menu for a little while?
-Of course,＿，sir.
A.don't worry B.it dosen't matter C.enjoy yourself
D.take your time
第一题最好分析一下句子结构，谢谢！！！
參考答案:1) A
which 引导的非限制性定语从句.
of great importance短语=important
另外"I think" 严格说不是插入语, 是从句中的主语和谓语
2) D
