一道英语选择题.Students are planting trees.Some are digging holes,s

一道英语选择题.Students are planting trees.Some are digging holes,s we are planting trees by the river,some are digging,some are They are planting trees,too.some are planting,some are carry ________ students are now planting trees in the field． the students are planting trees over there.what look some children are planting trees 的意思 Look!Some trees _____ by them.A.are planted B.are planting C The students are planting trees _on__the__hills_ now.(对画线部分提 More than tow hunderd students are planting trees on the mou they are planting trees now是什么意思 Trees are important _______ us.Planting trees is important _ The teacher with some students are 还是is plating trees.