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    One Sunday morning Mr. Green and his child, Bill, are in a big shop. Mr. Green wants to buy a new blouse for Mrs. Green. Bill likes oranges, so his father buys two kilos（公斤）of oranges for him, too. Bill wants to buy some picture—books and colour pencils, too. There are many people in the shop. They are men and women, old and young. They all want to buy something there.