You must turn off your cell phone when you take a plane.改为否定

You must turn off your cell phone when you take a plane.改为否定 You must turn off your cell phone when you take a plane改为否定句 You must turn off your cell phone when you take a plane同意句 You should turn off your mobile phone when the plane _______ when the plane take off ,you（ ）use your mobile phone Do you have lost your privacy when you have a cell phone 英语翻译Take Them Off!You need to know when to turn your MP3 off You must turn off the radio when you do your homework.被动 Take off your coat.（改为否定句） ＿＿＿＿take off you 求一篇英语作文 Turn off your cell phone" you must take your turn when you buy the train ticketyou mus could you please tell me when the plane -------(take off)