Question

"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

Answer 1

答案A
此题考查的是关系代词，首先认清这是个非限制性定语从句，其次，分析I think作插入语，因为of great importance to science前面缺少谓语动词，应选A项。此题意思是“他又作出了惊人的发现，我认为他的发现对科学极为重要”。