—Is Mary         friend?—No,       isn’t.

—Have you brought        with you? We won’t have time to come back.—Don’t worry. All the things we need are here, in this big bag.

I found _____ very difficult to learn  maths  well.

—I don’t like the color of this sweater. Would you please show me __ one?— Here you are.

We found          impossible to finish the work in such a short time.