It isn't known that how these huge stones were transported over a distance of 380 kilometres.这句话是否正确?是否是形式主语+that从句结构?

It isn't known that how these huge stones were transported over a distance of 380 kilometres.这句话是否正确?是否是形式主语+that从句结构? That for me .it isn't that for me ,it isn't over. That's an interesting story ,_______? A.isn't it B.isn't that谢谢 Isn't it strange that the lazy boy这里Isn't it 是什么用法? That's unfair for him,_____?A is it B isn't it Cis that D isn't that that' gina ,isn't it?----____ a.yes she is b.no she isn't c.yes is isn't d.no it isn't 请详解 that' gina ,isn't it?----____ a.yes she is b.no she isn't c.yes is isn't d.no it isn't 请详解 Is that your brother?回答A.No,it isn't B.No,he isn't that is your twin brother,----?反义疑问句是 isn't he 还是isn't it? Is that boy Ted?A.NO ,he isn`t B.NO ,it isn`t.填那个 That dress looks beautiful.But it isn't _e____ That is 36,isn't it?肯定回答是 But that's not worth ..isn't it? That car isn’t （）.It’s（） what you don't realize is that being well known for something isn't always a good thing. isn't that amazing Isn't that grand?