This machine need__(check) once a year这题怎么填啊

This machine need__(check) once a year这题怎么填啊 This machine is unavailable. This kind of machine can p_______ music. This machine is very easy to This machine is very easy to the machine has been recovered this Machine Machine Machine This is a very expensive machine同义句转换This is( ) ( ) ( ）machine He ordered a washing machine by phone yesterday,and _____ machine will arrive this afternoon. Come and see this machine,Pat and koko. 解释 补充This kind of machine can p___ muice Come and see this machine,Pat and Koko. This machine is used for-----(cut) things into pieces this factory produces machine tools改为被动语态 This machine is ______(easy to undrestand) to ues. who designed this kind of machine?改为被动语态 help~