填空题 It is encouraging to note that in recent years, cigarette smokers have been 1 the decline, especially among older people.
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【正确答案】 1、on    
【答案解析】解析： It is encouraging(奖励的) to note(注意 )that in recent(近来的) years, cigarette(香烟) smokers have been on the decline(下降) , especially(其) among(之一) older people. 令人鼓舞的是注意到，近年来，卷烟烟民一直在下降，特别是中老年人