How much are these socks?—______ two dollars.

Listen! Tom is singing in the next room.–It _______ be Tom. He has gone to Shanghai.

Why do you call him Mr．Knowledgeable?— Because he knows almost everythingwe want to know．

My grandfather is as ________ as a young man and hates sitting around doing nothing all day.

Do you know the song Gangnam Style? —Of course. It interesting.