Miss Li: Where did you go last summer, Peter?
Peter: Last summer, I went to an island. We went by boat. The sea was beautiful and blue. We went to the beach every day and swam. My arms are stronger now. We ate delicious food, too.
Miss Li: Where did you go last summer, Betty?
Betty: My cousins and I went to Huangshan last summer. It is a mountain. It is very high. We climbed all afternoon. We saw beautiful trees and rocks there. Then we went to a lake in Hangzhou. We rowed a boat and had a really good time there. 
Miss Li: What about you, Mary?
Mary: I went to the USA to see my aunt. There is a river near her house. You can’t swim in it. It moves very fast but you can look at it from the bridge. It’s very long. It’s 1,500 km long.