English英语教学课件Module2NoDrugsIntroduction高一外研版必修二Topfourreasons:Theywanttoreduce(减少)pressure(压力).(好奇).?,(21thousand/21billion)(10/20),smokingcauses(12,000/121,000),(everyhour/everyday)o,suchascancer,,about(20/200)peoplearekilledand(200/2,000),000
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