HOW did you make the examination papers?全部改被动语态

问题描述:

HOW did you make the examination papers?全部改被动语态
HOW did you make the examination papers?
must we hand in the examination pepar now?
can we grow lemon in the north of china?全部都改被动

how did examination paper be made?must the exam paper be handed in now?can lemon be grown in north of china?