Hundreds of years ago,life was much harder than it is today.

Hundreds of years ago,life was much harder than it is today.People didn’t have modern machines.There was no modern medicine,either.Life today has brought new problems.The biggest one is pollution.Water pollution has made our rivers and lakes dirty.It kills our fish and pollutes our drinking water.Noise pollution makes us talk louder and become angry more easily.Air pollution is the most serious kind of pollution.It’s bad to all living things in the world.
Cars,planes and factories all pollute our air every day.Sometimes the pollute air is so thick that it is like a quilt over a city.This kind of quilt is called smog.Many countries are making rules to fight pollution.Factories must now clean their water before it is thrown away,they mustn’t blow dirty smoke into the air.We need to do many other things.We can put waste things in the dustbin and not throw them on the ground.We can go to work by bus or with our friends in the same car.If there are fewer people driving,there will be less pollution.
( ) 1.Hundreds of years ago,life was much harder than it is today because _____.
A.there were not any modern machines B.there was no modern medicine
C.both A and B D.there were not many people
( ) 2.What is the biggest problem in today’s life?
A.Pollution.B.Air pollution C.Noise D.Water pollution
( ) 3.The most serious kind of pollution is ______.
A.noise pollution B.air pollution C.Water pollution D.A,B and C
( ) 4.Factories must clean their water ______.
A.before they are thrown away B.when they are thrown away
C.after it is thrown away D.before it is thrown away
( ) 5.From this passage we know that ______.
A.a few years ago there was no smoke at tall
B.today people don’t have to talk to each other loudly
C.we can drink water from the polluted rivers and lakes
D.people are making rules to fight pollution