10.Our playground ________________(占据) a quarter of our school.
11.Peopl
e __________________(有困难) finding new land to put rubbish in.
12.In this passage, Blanket _______________（提到）the ozene layer in the sky..
13.When it rains hard, the earth on the ground is often ________________(带走) by water.
14.I hope our school will become better and better __________________(一天天).
