Say, don't I know you from somewhere?

我是不是在哪里见过你？

Whatever you decide is all right with me.

不管你怎么决定我都会赞成的。

Where did you get such a nice tan?

你到哪把皮肤晒成棕色的？

I an no match for you at running.

在赛跑方面我不是你的对手。

What do you do, if I may ask?

你不介意的话，能告诉我你是做什么工作的吗？

I just received your letter and I want to let you know my opinion on your plans for the future.

来信已收到，我想告诉你我对你将来打算的看法。