In your schoolbags, you may have a pencil, some kinds of pens, a ruler and some books. None of these things grow in the fields. They were all made in factories. And, of course, they were invented by some people. There have not always been pencils or pens, a ruler and books. Thousands of years ago no one knew about these things.

Who invented them first? How did they have such clever ideas? We always don’t know. There have been thousands of inventions, large and small, in the human history. Some of these inventions have changed the world, such as paper, printing, radio, telephone and computer, and we know the inventors. But we have forgotten most of the other inventors.

Who invented the clock, for example, or the lock to the door? We don’t know. There have been thousands of inventors and we should be grateful（感激的）to them for their clever ideas. Will you be one of them when you grow up?

【小题1】The things in your schoolbags are made in ________.

A．wood

B．factories

C．metal

D．fields

【小题2】Which of these things can’t be found in your schoolbag?

A．Books.

B．Rulers.

C．Pens.

D．Cars.

【小题3】The inventors invented these things because __________.

A．their children were at school	B．they hoped to save some money
C．they had a lot of clever ideas	D．they had good machines

【小题4】We don’t know __________.

A．the name of the inventor of paper	B．the name of the inventor of telephone
C．the name of the inventor of printing	D．the names of most inventors

【小题5】The writer wonders __________.

A．if you are an inventor	B．if you want to be an inventor
C．what’s invented by you	D．how many inventors you know