找出划线部分错误的一项，并且在题后横线上改正。
Could you tell me some informationsabout the tour to Taiyuan.
I’d like to buy two air ticketsfor Nanjing.
What present are you going to buy to me, mum?
Everything therewere very beautiful, we enjoyed it very much.
The math problem was very difficult that few students could work it out.