用下列单词的适当形式填空,补全短文.hear,make,way,use,serious,problem,live,much,keep,move
Life today is much easier than that of hundreds of years ago.But there are new problems.One of the biggest --------- is pollution.The pollution comes in many -------.we see it,drinks it and even -------- it.
Humans have been polluting the earth.The more people there are,the ------- pollution there will be.Many years ago,the problem was not ---------- because there were not so many people.In the past,when the land was --------- up or the river was dirty in one place,humans -------- to another place.But humans are now slowly polluting the whole world.
Air pollution is the most serious problem.It's bad for all ------- things in the world.Water pollution kills fish and pollutes our drinking water.Noise pollution ------- us get angry more easily.
The earth is our home.we must take care of it.That means ------- the land,water and air clean.