You have black hair and black eyes. I have blond hair and blue eyes. We .A.look the same B.look different C.are in different grade
--You don’t look ______ today. What’s wrong? --It’s the bad fever.
Sometimes parents find ______ hard to communicate with their children.
Nowadays scientists are working hard to find out ______ to do with air pollution.
Good teachers can usually give the students______ advice on their study.
Chinese people have been using paper for over______ years.