任务型阅读生活总是在不断变化,变化不仅带来了进步,也会带来一些问题…Hundreds of years ago,life

任务型阅读
生活总是在不断变化,变化不仅带来了进步,也会带来一些问题…
Hundreds of years ago,life was not like it is today.It is very hard.People had to do all the ghings by themselves.Today people have a more comfortable life.They have many different machines to help them.
However,theses machines have brought some new problems.One of _______(big) ①Problems is pollution.Water pollution has made our rivers and lakes dirty.② It kills the fish and pollutes our drinking water.Noise pollution makes people become angry easily.Air pollution is the most serious one.这对世界上所有的生物是有害的.③
Cars,planes and factories all pollute our air every day.Sometimes the polluted air is thick.And the sky looks brown.④
Many countries are trying their best to reduce(减少) the pollution.They even make rules against the pollution.Besides(除…之外) the government’s actions,we also need to do some things.We should put waste things in the dustbins instead of throwing them on the ground.We can walk to school or ride a bike.If there are fewer people driving,there will be less pollution.Rules are not enough to solve the problems.Every person must take some actions to reduce the pollution.
根据文章内容,完成下列各题.
1.将④改成同义句,每格一词：
Sometimes the polluted air is ________ thick _________ the sky looks brown.

Sometimes the polluted air is ____So____ thick ____that_____ the sky looks brown.