---Look at the boy running on the playground. Is it David? ---It ______ be him. I saw him go to the teachers’ office just now.
—Please don’t throw paper on the ground. —________,I won’t.
Please remember ________ your MP5 player to my home.
Many students don’t like Li Wei because he often ________ for class.
Sorry,you ________ play basketball in the classroom.
Her bike is broken.She ________ walk to school.