—I could believe my eyes when I came to Nanjing last year. —Yes. Great changes have taken place in the past few years.
-? -Yes, I’d like to buy some milk.
-_______Where is the dining hall? -It’s behind the classrooms.
-________students are there in your class? -There are 56.
-What are these? -They are_________.
-This is my friend, Leo. -