Her brother_____the Party since 1978.A.joined B.has joined C.has been in D.was in

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• 关于英语现在完成时的问题 1 His father joined the party _____ A.for three years B.since three years ago C.three years ago D.in two years' time 2.Her father____ in 1990 and her husband ____for more than five years.A.died ,dead B.has died ,dead C.died,has been dead D.has died.has died 3.Lihua's bother has ____for tuo years.A.joined the army B.been an army C.become a soldier D.been in the army 4.He hansn't ______ quanzhou ever since he left school.A.left B.been away
• Her brother_____the Party since 1978.A.joined B.has joined C.has been in D.was in
• 英语现在完成时练习1.we_____jim since she was a little girl.A.know B.had known c .have known D.knew有was为什么不是B.2.His father_____the party since 1978A.joind B.has joined C.was in D.has been in B为什么不可以?3.his uncle_____for more than 9 yearsA.has come here B.has started to work C.has lived there D.has left the university一定么?ps;每题后面有我提的问题,
• Her brother_____the Party since 1978.A.joined B.has joined C.has been in D.was in
• He joined the party in 1999.(同义句转换）
• 数列{an}是首项为1000,公比为1/10的等比数列,数列{bn}满足bk=1/k(lga1+lga2+…+lgak)(k∈N＊)１．求数列{bn}的前n项和的最大值. ２．求数列{∣bn∣}的前n项和Sn’   (要有具体过程额