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One day a Paris newspaper (have) an advertisement about a very cheap way of travelling. Many people (believe) it and (send) their money. A few days later each (get) a letter. The letter (read): "Sir, (rest) in bed and (remember) that the Earth (turn). Paris (turn) together with the Earth. You (travel) more than 25,000 kilometres a day. You (may) (look) out of the window and (enjoy) your journey."