You must cut off the electricity before you change the bulb为什么要用两个the

You must cut off the electricity before you change the bulb为什么要用两个the 翻译：Before you examine the wire,you must cut off the electricity. You must cut the turkey into thin pieces.改为祈使句 CUT OFF THE MEAT是什么意思 cut off the traffic是什么意思 You must （ ）before you eat the meat.A.cut up it B.cut up them C.cut it up D.cut them upA.cut up it B.cut up them C.cut it up D.cut them up cut up?cut out?cut off?cut out?you are not ____for this job, the manager told one of his employees. Cut off the scales and cut open the stomach 请说明原因The light in the room__before you leaveA must turn off B will turn off C are turned off D must be turned off cut-off cut-off you must keep off the grass; you mustn't pick the flowers; you mustn't litter. you must cut up the bananas(改为祈使句)____ ____the bananas With the electricity ,all the machines stoppedA .was cut off B cut off cut off cut down区别0.We must plant more trees after we _____ every year.A.cut off them B.cut them off C.cut down them D.cut them down Bob,you hair is too long.You should get it( ).A.cut B.to cut C.cuts D.cuttingWorking hours must( )during the most severe spells of air pollution.A.cut B.be cutting C.be cut D.be cutted Jim,you_____(are wasting 还是waste)water!you must turn off the tapJim,you_____ (are wasting 还是waste) water!you must turn off the tap.说明为什么啊 You must keep the mobile phone off during the meeting.(改为被动语态）