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阅读下面这篇短文，短文后列出了7个句子，请根据短文的内容对每个句子做出判断。如果该句提供的是正确信息，请在答题卡上把A涂黑;如果该句提供的是错误信息，请在答题卡上把B涂黑;如果该句的信息文章中没有提及，请在答题卡上把C涂黑。 Look after Your Voice Often speakers at a meeting experience dry mouths and ask for a glass of water. You can solve the problem by activating the saliva in you mouth. First gently bite the edges of your tongue with your teeth. Or, press your entire tongue to the bottom of your mouth and hold it there until the saliva flows. Or you can imagine that you are slicing a big juicy lemon and sucking the juice. Before you begin your talk, be kind to your voice. Avoid milk or creamy drinks which dry your throat. Keep your throat wet by drinking a little sweetened warm tea or diluted fruit juice. If you sense that you are losing your voice, stop talking completely. In the meantime, do not even talk in a low voice. Save your voice for your health. You may feel foolish using paper to write notes, but the best thing you can do is to rest your voice. If it is necessary, perhaps you can get some advice from a professional singer. What about drinking alcohol to wet your throat? I advice you not to touch alcohol before speaking. The problem with alcohol is that one drink gives you a little confidence. The second drink gives you even more confidence. Finally you will feel all-powerful and you will feel you can do everything, but in fact your brain and your mouth do not work together properly. Save the alcohol until after you finish speaking. | 
