额.一些关于被动语态的题目改被动语态1.must i pay for it at once?_____ it _____

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  • 1.must i pay for it at once?__Is___ it __must___ __be___ __paid___at once?2.are the workers making a new kind machine now ?_Is__ a new kind of machine (being)(made)by  the  workers now?3.mr  green ( was seen  )(see)  growing  flowersjust  now.4.these  holes  for  the trees  (are)being (digged)(dig)now