What do you think of the most important inventions(發(fā)明) in the world? The TV? The printing(印刷術(shù))? 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 inventions is the toilet. Before toilets, waste ran into rivers from people’s houses. Illnesses(疾病) were common(常見(jiàn)) 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 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 forty-five. Without glasses, the world would be difficult for the people above forty-five.

Important1.
 

Some most important inventions
 

The TV, the2., the3., the computer
 

Three other important inventions
 

Before the inventions.
 

The4., one of the simplest inventions
 

5.ran into rivers from people’s houses.
 

6.were common in big cities.
 

It was often difficult to find7.drinking water.
 

Hay, animal food
 

Most animals were killed in8.because there wasn’t enough food in winter.
 

9.
 

Reading, writing and “close work” would be difficult for the people10.than 45.
 

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