1.we haven't met for a long time.it is very nice to meet you.
2.please don't get angry,because we will be sad for that.
3.i had seen you before.
4.XXX always mentions you when we talk and he says you are a goog guy.
5.i had heard of you before.
6.i am wondering whether you remember me?
7.are u happy in your holiday?
8.i didn't go to any place in the summer holiday.