the drops of water in the clouds become very cold and turn ____ice.A.off B.on C.down D.into
问题描述：
the drops of water in the clouds become very cold and turn ____ice.A.off B.on C.down D.into
答
turn off关掉,关闭,关上
turn on打开,发动,接通
turn down拒绝,关小,调低
turn into变成,进入,变为
所以选D