its speed and there won't be any accidents.On the other hand，space planes will take people around the earth in about three hours.People will fly from Los Angeles to Tokyo by space plane in just half an hour.

　　In the field of technology，robots will have replaced people in factories.By 2050，we will see robots everywhere.They do not ask for pay rises or go on strike，and they work 24 hours a day.

　　Medicine technology will have conquered(征服)many diseases by 2050；we will be able to help blind and deaf people see and hear again.Scientists have discovered how to control genes.They have already produced clones of animals and will be able to produce clones of people and decide how they look，how they behave and how much intelligence they have.If you want all this to come true，you should study science and technology hard.

　　【解题导语】　本文是一篇展望未来的文章。预测了在2050年我们生活上可能出现的几个大的改变。

5．What is the main difference between today's and 2050's TV?

A．We can use a computer to turn off the TV set.

B．We can talk with the characters appearing on TV.　

C．We can choose whatever we like to see on TV.

D．We can touch the things we see on TV.

D　解析：细节理解题。根据文中第二段的We will be able to see，smell and touch the things that we see on television.可知答案。

6．What will be more likely to cause the war in the future?

A．The lack of water.

B．The less farmland.

C．The shortage of robots.

D．The more space planes.

A　解析：细节理解题。根据文中第三段的Demand for water will increase ten times in 2050.Some futurologists predict that water will be the cause of war if we don't act now.可知答案。

7．Which of the following is TRUE about the transport in the future?

A．Robots will control the speed of the car.

B．We can travel around the earth in about three hours.

C．There will be more flights from Los Angeles to Tokyo.

D．Cars can run without any fuel.

B　解析：细节理解题。根据文中第四段的On the other hand，space planes will take people around the earth in about three hours.可知答案。

8．From the passage we can infer that by 2050 ________．