—Is this          pen, Tim? —No. It’s Mary’s.

—What did you do yesterday?—My brother took two friends of ________ to play chess with us. But I don’t’ know _______ of them.

—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.

—Who helped Jessie with her English?   —_________, she taught herself.

—I don’t think it very expensive to buy a family computer here.—Really? I’ll buy _____ next week.