Now machines are widely used all over the world. Why are machines so important and necessary（必要的）for us? Because they can help us to do things better and faster.

A washing machine helps us to wash clothes fast. A printing machine helps us to print a lot of books, newspapers, magazines and many other things fast. Bikes, cars, trains and planes are all machines. They help us to travel faster than on foot..

The computer is a wonderful machine. It was invented not long ago. It not only stores（貯存） information (信息）but also stores numbers millions of times as fast as a scientist does.

Let’s study hard and try to use all kinds of machines to build China into a modern country.

1.Machines can help us to do things better and faster, so they _______.

A.are difficult to make B.are expensive

C.are important but not necessary D.are very helpful

2.We have to travel on foot without _______.

A.bikes B.machines C.planes D.trains

3.Computers can store information and numbers _______ a scientist does.

A.a little faster than B.as fast as C.much faster than D.much more slowly than

4.If we want to build China into a modern country, we must _______.

A.study hard B.try to use all kinds of machines

C.invent many machines D.A, B and C

5.A printing machine can help us _______.

A.print a lot of books B.read more books C.invent many machines D.wash clothes fast

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