Look at the trees.they can not stand .it is[ ][ ]填什么?急

Look at the children.They_____(plant) trees on the hills look at sb in th mirror,in the local mine Look at the trees.they can not stand .it is[ ][ ]填什么?急 At the 27th look at the apple ( ）the trees A.at B.in c.on选哪个,为什么呢? Look At The Sky look at the boy. look at the Look at the picture Look at the 造句 look at the look at the chart look out at the look at the beach Look at the blackboard look at the Look at the look at the ( ),please