51.　A.　ignore B.　follow C.　believe 　　 D.　understand

50.　A.　washing B.　taking C.　cleaning D.　moving

49.　A.　usual B.　last C.　next D.　first

48.　A.　alone B.　away C.　outside D.　off

47.　A.　worked　out 　　B.　found　out C.　put　out D.　thought　out

46.　A.　at B.　before C.　around D.　for

45.　A.　must B.　should C.　might D.　could

44.　A.　never B.　always C.　seldom 　　 D.　ever

43.　A.　family B.　workers C.　customers D.　friends

42.　A.　had B.　tended C.　hated D.　managed