题目内容：

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“Four great inventions" in ancient China are important symbols of the country. Now China has “new four great inventions”: high-speed trains, mobile payment, bike sharing and online shopping. They are changing people’s lives in China and maybe all over the world.

High-speed trains

By the end of 2016, China had the world’s largest high-speed railway network. More than 2,500 high-speed trains are running across China each day.

Lin Jinlong, an overseas student from Cambodia, shared his experience of traveling by Chinese high-speed train from Beijing to Tianjin. The two cities are over 100 km away, but the trip took only about half an hour. “That was amazing!” Lin said.

Mobile payment

Mobile payment has become a part of Chinese people’s everyday life. It makes their lives much more convenient. “My wallet is no longer in use. I .can buy and eat anything I want simply with my smart phone,” said Lin. “Even vegetable sellers are using mobile payment.

Bike sharing

Bike sharing is not new itself, but the bike sharing in China stands out -- it allows users to pick a bike anywhere in the city and leave it anywhere at the end of their journey. It’s really convenient, cheap and green. Mobike, a bike sharing company, has even brought the service to some other countries.

Online shopping

You are out if you have never shopped online. Now you can buy almost everything from websites like Taobao and JD, and get what you’ve bought within days. China’s online shopping makes many foreigners feel both excited and surprised.

1.Do “new four great inventions” only change people’s lives in China?

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2.When did China have the world’s largest high-speed railway network?

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3.Why does Lin say his wallet is no longer in use?

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4.What does the writer think of bike sharing?

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5.Where can you buy almost everything if you shop online?

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