英语句子改错,

英语句子改错,
1.the manager for them prepares some beautiful gifts.
2.could you tell to me something about their cultural background?
3.Mr.wang has left in their mind a deep impression.
4.Do they always wave to you goodbye in an informal way?
5.there are always some people talk happilk in the park.
6.there has some water in the glass.
7.on the door has a big red chinese word "happiness".