题目内容：

I'm sure the 2012 olympic games will be held in London,____ A shall we B won't it C won't they
D aren't I ..

优质解答

B won't it 是对的.
祝你进步!

追问：

为什么呢？ 有解析么

追答：

I am sure 和I think一样，反义疑问句，都是根据从句来问的。从句的主语是olympic games，当做单数it。助动词是will，前面肯定，后面否定