Man’s first real invention ,and one of the most important inventions in history , was the wheel. All transportation(运输)and every machine in the world depend on it.

　　The wheel is the simplest yet perhaps the most remarkable(惊人的)of all inventions because there were no wheels in nature──no living things was ever created(创造)with wheels .How ,then, did man come to invent the wheel?

　　Perhaps some early hunters found that they could roll the heavy animal they had killed through the forest on logs more easily than they could carry it. However ,the logs themselves weighed a lot.

　　It must have taken a great thinker some time in ancient times to imagine two thin pieces of log connected at their centers by a strong stick. This would roll along just as the logs did yet be much lighter and easier to move by hand .Thus the wheel and axle(轮轴)were invented ,and with them the first cart.

1．The wheel important because _______.

[　　]

A．it was man’s first real invention

B．all transportation depends on it

C．both A and B

D．every machine depends on it

2．The wheel is called ________.

[　　]

3．It was remarkable of man to invent the wheel because ________.

[　　]

A．it led to many other inventions

B．man had to use for it then

C．there were no wheels in nature

D．all of the above

4．The wheel was probably invented by ________.

[　　]

A．a group of early hunters

B．the first man on earth

C．a great thinker

D．the man who made the first cart

5．This passage says that the first wheel may have been a________.

[　　]

A．round piece of stone

B．Heavy log

C．piece of metal

D．piece of log

　　Man’s first real invention ,and one of the most important inventions in history , was the wheel. All transportation(运输)and every machine in the world depend on it.

　　The wheel is the simplest yet perhaps the most remarkable(惊人的)of all inventions because there were no wheels in nature──no living things was ever created(创造)with wheels .How ,then, did man come to invent the wheel?

　　Perhaps some early hunters found that they could roll the heavy animal they had killed through the forest on logs more easily than they could carry it. However ,the logs themselves weighed a lot.

　　It must have taken a great thinker some time in ancient times to imagine two thin pieces of log connected at their centers by a strong stick. This would roll along just as the logs did yet be much lighter and easier to move by hand .Thus the wheel and axle(轮轴)were invented ,and with them the first cart.

1．The wheel important because _______.

[　　]

A．it was man’s first real invention

B．all transportation depends on it

C．both A and B

D．every machine depends on it

2．The wheel is called ________.

[　　]

3．It was remarkable of man to invent the wheel because ________.

[　　]

A．it led to many other inventions

B．man had to use for it then

C．there were no wheels in nature

D．all of the above

4．The wheel was probably invented by ________.

[　　]

A．a group of early hunters

B．the first man on earth

C．a great thinker

D．the man who made the first cart

5．This passage says that the first wheel may have been a________.

[　　]

A．round piece of stone

B．Heavy log

C．piece of metal

D．piece of log