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Please number the sentences to make an announcement. 1. Passengers for this train please get your tickets ready and go to Boarding Gate 5. 2. Thank you. 3. The station announces the boarding of Express Train D4 for Shenyang. 4. You are advised to make sure that you've nothing left behind in the waiting room. 5. Ladies and gentlemen, attention, please. A. B. C. D. E.