Do you know the boyis sitting next tu Peter?–Yes, he is Peter’s friend.They are celebrating hisbirthday.

Mr Smith lives_____ that building. His house is_____ the fifth floor. [ ]

The river smells so terrible! How did it come about?—People used to pour dirty water into it.

Have you finished using my dictionary?—Yes, I put it back on your desk just now. Who ________ it away?

Bill is an _______ boy.