1.I've come to do sth.我来是做某事的
I've come to meet you on behalf of our school.
2.thank you for doing sth.谢谢你做了某事
Thank you for coming to meet me.
3.did you…你……了吗
—Did you have a good journey?
—Yeah,very good.
4.let's do sth.让我们一起做某事吧
Let's go back to the hotel of our school.
5.sth.is ready for sb.某物为某人准备好了
Everything is ready for you there.