Look at this blue p____.This is our home.There are plains,m____,r____,lakes and o____ on it.There are all k____of trees,flowers and g____ on it.There are all kinds of wild animals l____together with us.Don'tyou want to keep our planet b____?But sometimes we do bad t____ to it.We w____too much water.We cut down too many t____.We hunt too much many wild a____for our food or c____…We shouldn't do these things.We should s____ our planet b____ we have only one planet.