1.London isn't cleaner than it was 10 years ago,right?

问题描述:

1.London isn't cleaner than it was 10 years ago,right?
要表达LONDON比之前干净了,该怎么答呢?是说YES IT IS ,还是?.
2.I am the only boy in the class,______?(反意疑问句?)

1.yes,it is.
2.isn't it?指的是这个事实.