How lovely day it was yesterday,isn't it?/wasn't it? 选哪个?

—Lovely day,isn’t it? Isn't it lovely weather? It's a lovely day ,isn't it?Yes,isn't it.有这种用法吗? it wasn't foggy yesterday. Isn't it a lovely day?的答语为什么是Yes,isn't it? What lovely day,isn't it?求回答 Lovely day,isn't it?这句话怎么回答? What a lovely day,isn't it?麻烦翻译 It was fine yesterday.--I( ),and a lovely day for panic,wasn 有类似于这样的句型吗?It's a lovely day ,isn't it? Yes,isn't it. This year’s weather isn’t as it was last year,（ A.wasn’t it It's a lovely day,isn't it?这个句子有错吗?