10.During the last three decades,the number of people participating in physical fitness programs___sharply.　　A.was increasing B.has increased C.had increased D.will be increasing

during the last twoyears用于什么时态 during the last few years与during the last a few years有区别吗? During-the-last-year-of-study-at-University是什么意思 During-the-last-year-of-study-at-University是什么意思 I ______ (落下) my backpack during the concert last weekend. what did you du during the last Soring Festival?awhat did you du during the last Spring Festival? in the last two years/during the last two years/in the past two years/during the past two years有什么区别? during the three days 做状语时的时态during the last three days 做状语时的时态 时态区别during the last two weeks during the night 为什么前者是跟现在完成时,而后者跟过去时? 时态区别during the last two weeks during the night 为什么前者是跟现在完成时,而后者跟过去时? during the during the 1.用定语从句合并下列句子.My uncle had three sons.Two of them died during the last earthquake.My uncle had three sons,two of whom died during the last earthquake.请问1,这里为什么要用限定性定语从句呢?2,为什么关联词是t last do what summer you during do thelast do what summer you during do the holidays(连词成句) 当句子的状语为“during the last+时间”（如：during the last ten years),谓语动词用过去式还是过去完成时?有人能否回答的正常些？ 10.During the last three decades,the number of people participating in physical fitness programs___sharply.　　A.was increasing B.has increased C.had increased D.will be increasing We didn't see anything during the _____(fly) people didn't know what_____(happen）during the night