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听力原文:W: There are pills for everything now, aren't there? M: Almost everything. There are pills for colds and pills for headaches. W: There are pills for seasickness and pills for airsickness. W: Those are the same, aren't they? Being sick on a ship is like being sick on a plane, isn't it? W: I suppose so. There are pills to make you sleepy. M: And there are pills to keep you awake. W: But they're bad for your health, aren't they? M: That's right. W: There is a pill to make you hungry, isn't there? M: I don't know. But there are pills to keep you from being hungry. They're for people who want to lose weight. W: There's a pill for almost everything, isn't there? M: But there aren't any pills to learn languages, are there? Which of the following is not mentioned?