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(单选题)The best title for the passage is ______. (单选题)“There is money in fashion” means ______. (单选题)Today fashions change very quickly because _______. (单选题)From this passage we know that “fashion” means ______. (单选题)Why do teenagers go to sleep late according to Carskadon? (单选题)How many hours of sleep do 11-year-olds need every day? (单选题)What is the new National Sleep Foundation survey on? (单选题)Which of the following is NOT related to the origins (起因) of (单选题)Which of the followings is NOT true? (单选题)According to the passage, dreams come from the sleeper’s ___