It's an English story of few new words,--?

问题描述:

It's an English story of few new words,--?
后面该填什么呢?
我知道是填isn't it.请问是为什么

isn't it?
这是反义疑问句.句子前面It's 是肯定的,所以反义疑问句要用否定的isn't it.
要注意I think 的反义疑问句是要根据从句的.而从句中的否定通常前置.