What do you think of the most important inventions in the world？The TV？The printing？The telephone？Or the computer？A report shows that they are not the only important inventions.Here are three other important inventions.
    One of the simplest（最簡(jiǎn)單的）inventions is the toilet（沖水式馬桶）.Before toilets，waste ran into rivers from people's houses.Illnesses were common in big cities，and it was often difficult to find clean drinking water.
    Animal food is another important invention.Before the invention，most animals were killed（殺死）every autumn because there was not enough food for them in winter.After hay（干草）became a kind of common animal food，animals could live through the long winter.
   The third great invention is glasses.Glasses help people read，write and do"close work"after the age of 45.Without glasses，the world would be difficult for the people above 45.

Inventions
Some most important inventions	Three other simple inventions	Before the inventions
The TV The printing The telephone （1） The computer The computer	The toilet	Waste ran into rivers from people's house. Illnesses were common in big cities. It was often difficult to find（2） clean drinking water clean drinking water .
	Hay/Animal food	People killed most animals in autumn because（3） there was not enough food there was not enough food in winter.
	（4） Glasses Glasses	Reading，writing and other"close work"would be difficult for the people（5） above 45 above 45 if there were not glasses.