１．What kind of effects does pollution have on human health?Why is the pollution of the environment one of the biggest problems we are facing today?2.What are the main cause of stress?Do you ever feel tense?How do you usually cope with stress?要求：三分钟陈述．谢谢
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可以报个口语班，平时多听广播，听英文歌曲．很有帮助的．