我们中没有人吸烟。

___None of us smoke.

对不起，一点都没剩。

I'm sorry there's ___none left.

由于我们中以前没有人去过那里，我们雇了一个自称懂英语的向导，然后开始参观废墟。

Since ___none of us had been there before, we hired a guide who claimed that he knew English and then we began looking at the ruins.