Have you seen a dictionary?— There’s one on the teacher’s desk. Is it _____?

.—I can’t find Mr. Smith. Where did you last see him this morning?—It was in the hotel _______ he stayed.

We must try our best to stop the pollutiona happier life.

My friend Tom comes from Canada and _______ is a tall boy with blue eyes.

Many students in our school _______ the old and they usually offer their seats to them on buses.