Passengers don't buy tickets from a conductor,they put their

Passengers don't buy tickets from a conductor,they put their all passengers had to buy tickets（ from a bus conductor） 划线部 In the past,all passengers hadto buy tickets from a ( ) passengers wishing to buy train tickets from january 1,2012 People do not have to buy tickets from bus conductor.(保持句子意思 英语翻译：They don't have to put all their effort into studying a Don't buy your ticket from a ticket machine.翻译 All passengers are ____ to show their tickets . They buy tickets instead of turning on their TV sets to watc 1.They ____ their homework in the evening.A.don't do B.don't they don't konw their parents are they don't doing their homework now.