I saw Jeff in the park. He _________ on the grass and reading a book.
–Our classroom _________ twice a day. So it is very clean.–It is important for us to do this.
–Where is Mr. Zhang? –He _________ for two days. Can I give him a message?
–_________ is your home from your school? –It is only fifteen minutes by bike.
–Would you mind _________ your voice down? We are doing our homework.–Sorry for that.
–I always make mistakes in my math exams. What should I do? –I think you should be _________.