【俚语】

That was close! 好险啊！
That was a close one! 好险啊！

【例句】

A：Watch out！
当心！
B：That was close!
好险啊！

Close a deal 成交

【例句】

We negotiated the terms of the agreement, and we will close the deal tomorrow.
我们已经谈妥了协议的条款，明天我们就会成交。

Close up shop 关门，歇业

【例句】

I loved that pizza place, so I'm very disappointed that it closed up shop.
我喜欢那个吃披萨的地方，但关门了，所以我觉得很失望。

Be close to sth. 几乎要

【例句】

When hearing the news, he was close to tears.
当听到那个消息的时候，他几乎要哭了。

Be too close for comfort
近的让人担心

【例句】

The way these planes fly so low over the house is just too close for comfort.
飞机飞过屋顶的时候这么低，真是让人担心。