the young trees must

the young trees must These young trees must--------------- you must tie the young trees to the sticke.(改为被动语态） you must tie the young trees to the sticks 改为被动句 急用 不是翻译句子 People must down the trees We must water these young trees ofen.(改为被动语态) ( )And put the young trees.( )Then water the trees The young trees required _ carefully. These young trees must_____.The shoes need_____ They put the young trees into the holes . We must take good care of young trees.改为被动语态 1.We must water these young trees ofen,(改为被动语态).