二. 重难点讲解：
Lingling : Welcome back, everyone!
Welcome back! 欢迎回来
welcome to spl.
eg. Welcome to China!
Betty : Hi Lingling! How was your holiday?
Lingling : Not bad! I went to Henan Province. But the trip back was very long. The train was full of people, and I had to stand for over six hours.
