—Whose book is this? — It _______ our teacher’s. You see, his name is on it.
It’s time_________ an English lesson.
---I think teenagers should be allowed to go out with their friends in the evening.--- ______ . It’s not safe enough.
---I am crazy about chocolate.---_____. That’s probably why I am becoming fatter and fatter.
---Why is the classroom so dirty? --- Sorry, sir. It ______ yesterday. We forgot to do it.
---Would you like something to drink? ---Yes, ______ , please.