What will the world of the future be like？ There are plenty of people who are happy to give their opinion of what we will be doing in 2050． Here are two predictions about the world of tomorrow．

When we dream about the future， many like to think of owning a personal flying car． The advantages are obvious． This technology would allow total freedom of movement． We could fly at 480 km per hour， avoiding traffic lights and busy roads．

However， some people believe there will be problems with traffic control． If the cars become popular， there is likely to be air traffic jam． Another big problem is mechanical failure． What will happen if the cars stop working？ These are problems we must expect if flying cars become a reality．

Three﹣dimensional printing is another new technology with exciting possibilities． 3D printers are used to build an object with liquid plastic．They build the object layer by layer until it is complete． Car companies already use 3D printers to make life﹣size models of car parts， and medical companies use the technology to make man﹣made body parts． As we move into the future， 3D printing will revolutionize the way we shop， the way we manufacture and the way we treat sick people． The disadvantage is that such equipment will be extremely expensive．

So in the future， we might be able to fly to work or print out new shoes.Although there are some problems to solve before this will be possible， we can certainly dream of a world where technology makes life easier and safer for millions of people．

（1）What is the passage mainly about？ 　　

A．	Environmental protection．
B．	The world of tomorrow．
C．	Advantages of technology．

（2）What do we learn from the passage？ 　　

A．	Some people think technology development may bring new problems．
B．	3D printing can bring great changes to our life and its equipment is cheap．
C．	The flying cars won't bring air traffic jam even when they become popular．

（3）What is the correct structure of the passage？ （P _I＝Paragraph1） 　　

A．
B．
C．

（4）What does the underlined word "they" refer to？ 　　

A．	Car companies．
B．	3D printers
C．	Body parts．

（5）We can infer that the writer 　　about the future life with technology？

A．	doesn't care
B．	feels hopeful
C．	feels disappointed