A.A和 B.B两部分组合成六个既完整又符合逻辑的句子:because of,owing to,due to, C.A1) D.The training center E.Wa F.S established2) G.The failure of the report was3) H.The training I.C J.Ourse was canceled4) K.Output went down5) L.Conditions everywhere have been seriously worsened6) M.Efficiency was increased7) N.The crops completely failed O.Ba)difficult trading conditionsb)imprecise terms of referencee)low staff attendanced)a disease that had set ine)low level of supervisory knowledgef)impmved training methodsg)owing to the postwar rise in prices