Not at all.

没什么。

Take care of yourself and don't forget to keep in touch.

多多保重。别忘了保持联系。

You can use quarters, dimes and nickels.

你可以使用2角5分、1角和5分三种硬币。

How do you do?

你好！

For how long?

要借多久？

It's unlikely he's here.

看样子他不象在这儿。