In the future, more and more people will move to big cities. To prepare for this, cities are becoming smarter and more efficient, with the help of big data.

Local governments are already collecting lots of important data. For example, there are sensors（感測器）that measure noise, pollution and traffic. This is known as "smart city technology". In the future, this data will make our lives much easier, by helping us save energy and keep the city tidy. There might even be smart posts that cull clean the air, or robots that empty rubbish bins when they are full.

Such technologies may be far off in the future, but others are just around the corner: self-driving cars are today being tested all around the world. Experts believe that this technology will change what cities look like. If self-driving taxis can use smart city data to find the best way to take you to your destination（目的地), there will be fewer traffic jams and more space for you to walk or ride a bike. People will probably stop buying cars altogether.

▲ : drones（無人機(jī)）are becoming more and more common nowadays. Cheap and fast

drone delivery services are only a few years away, and the sky above our heads will soon be very crowded. Hopefully, smart city technology will help prevent traffic jams in the air. Perhaps, drones will one day be able to transport people around town. Then, you could fly wherever you want to go!

To summarize, the cities of the future will be very different. What kind of city would you like to live in when you grow up?

1.Why are the sensors mentioned in the second paragraph?

A.To show that cities are becoming much smarter.

B.To explain why there are more people in big cities.

C.To help people in cities live a more exciting life.

D.To invent some new ways of keeping the city tidy.

2.What is a good result of using self-driving technology?

A.There will be fewer cars in the future.

B.Few people will ride a bike around.

C.People will have better driving skills.

D.All the car factories will go out of business.

3.Which can be put in ▲ ?

A.But there will be traffic jams in the air

B.New technology will appear in the future

C.Change is not only happening on the ground

D.Technology will surely play a part in our future life

4.What is the best title for the passage?

A.Transportation in the Future. B.Important Data in Cities.

C.Smart City Technology. D.The Cities of the Future.

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