Look at the boy running on the playground. Is it David? —- It ______ be him. I saw him go to the teachers’ office just now.

Only _________ save his life.

You are leaving your school．How do you like it?—Very much, of course, I this school since I moved here

______ does your cousin exercise? —Three times a week.

Must I go there right now, mum?—No, you ____. You can go there tomorrow.