You may use a first name if you are asked to (call me …).

如果你得到允许的话，你便可以直呼某人的名字。

What storage capacity do you need?

你想要多大容量的硬盘？

I made a pig of myself.

我吃得像一头猪！

Can I use your car for a couple of hours?

我们能借你的车用几个小时吗？

I want a package deal including airfare and hotel.

我需要一个成套服务，包括机票和住宿。

Breathing this air is killing me.

呼吸这样的空气真是致命。