Thanks for the invitation. And please give my regards to your wife.

谢谢你的邀请。请代我问候贵夫人。

Will it take long?

要很久吗？

How long will it take for my mail to reach its destination?

我的信件到达目的地要多久？

OK. I'll do as you say.

好的，照办。

Thanks. Could you point me in the right direction?

谢谢。您能告诉我要往哪里走吗？

I see. Is a credit card OK?

我明白了。用信用卡可以吗？