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问题详情：--Whydoyoulookunhappy?--______failingthedrivingtest.A.Becauseof            B.Because                C.For                D.As【回答】A知识点：连词题型...

问题详情： --Whydoyoulookunhappy,Maria?--Ican’tlearnmathwell______Ialwaysworkhard.A.because    B.and            C.although    D.so【回答】C知识点：连词题型：选择题...

问题详情：—Whydoyoulookunhappy,Lucy?             —Ican’tlearnmathwellIalwaysworkhard.       A.because            B.and                 C.although  ...