by planting more trees ,we can ________ the number of greenh

by planting more trees ,we can ________ the number of greenh we are planting trees by the river,some are digging,some are ________ students are now planting trees in the field． the number of the staff we can employ will be ---by how mone Planting trees can make the soil aovid changing into sand More and more trees need ___in the world.A.planting B.to pla We can find trees on both sides of the river Planting trees can help to make our e----clearer and more be The young pioneers are planting trees by the river 变成被动语态 We are going to reduce the number of trees being cut down 去掉 We plant trees every year.The number of ______ in our hometo If we use the new recycling method, a large number of trees