I think there are several types of memory in our brain ___? A.do not I B.are not there

题目

I think there are several types of memory in our brain ___? A.do not I B.are not there

答案

选择B,think为插入语,不充当句子成分可以去掉,原句变成there are several types of memory in our brain ,_____?则反义疑问应为“are not there”