-- ? --They are my books.
-----What’s this? -----It’s ________.
-If you have any trouble, be sure to call me. -______________.
“What are you doing , Amy?”“I want to ________ these pictures on the wall. ”
. -How do you come to school?-By bike. Taking a bus may _______ much money. And walking _______ too much time.
“Don’t be late again , Tommy”“OK,_______. ”