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新概念英语第四册课后题答案Lesson1CABDDBDAACABLesson2BCBDCACAADBCLesson3CABDACDABACDLesson4ACCABBCDAABDLesson5CABABDACBBDDLesson6CACCCAAADBAALesson7DCABABACDAACLesson8BDABDBAABCBCLesson9CDBAACABACADLesson10CAABDCBBDCAALesson11AABDDDADDBDDLesson12CABACCDACAABLesson13ACDACBDABCADLesson14DBDCCACCBDBDLesson15CADCDDBACACALesson16ABCCADDBABACLesson17BBADABBDCDCALesson18BABCDCDCCCBALesson19BBCADAABDDBCLesson20BCADCCCBDBCALesson21BDBBAADDABCALesson22CDACBADBCDABLesson23CADCCDCABCACLesson24AACCBCADDACDLesson25DBADDCACDBCALesson26CBCBACDDABACLesson27BCDCCACCDDDALesson28ADCDABCADABDLesson29CCADDCCADABCLesson30CABDDBCCACDCLesson31AABADBADDCBDLesson32BDCBADBDCABCLesson33BDBADBCCDCBALesson34DCACBDACDBCALesson35CBCACABBDCCDLesson36ACBCCACCDBACLesson37CABACDBCDCBDLesson38CAABBACBDDABLesson39BCADABDDBDBCLesson40DCDACADDDADBLesson41ACACDCBBBDBCLesson42BCCBDBDADCACLesson43DBABCCDDACBBLesson44AAAABBBBDCBALesson45CADACCACDCDCLesson46BBDBDABCDABDLesson47CAADBCACDBBCLesson48CCBCCCCDBAAB