---Who is _______ man with a ponytail (马尾辫)under the tree ?--- Sorry, I don’t know. But I think he must be ______ artist.
______is the population of your city? -It’s about 6 million.
______ you _____ free next Sunday?
This mountain is about __________.
I didn’t see________in my room.
--_______ not very difficult for us young people _______ English. --So let’s study hard.