China has once again showed its ability to change the world with its “four great new __41__ (invent)” — high­speed rail, electronic payment, shared bicycle, and online shopping．

China’s new­generation high­speed train, the Fuxing Hao, is now one of the __42__ (fast) trains in the world, which can travel at a speed of 350 km/h．Besides high­speed rail, China __43__ (improve) people’s lives in many other innovative ways over the last decade．

Bike sharing, for example, is not new itself．But China has made __44__ much more convenient and popular both in China __45__ overseas．The leading Chinese bike­sharing companies Mobike and Ofo are now operating in foreign countries such as Singapore and Britain．

And back in China, when riding a shared bike, you can stop __46__ (buy) and eat whatever you want __47__ (simple) with a tap on your phone．You could easily pay with your smartphone by __48__ (scan) the seller’s QR code． Cashless payment has grown into a __49__ (choose) for Chinese people — even a pancake seller is using Alipay．

As for Alipay, it was designed to serve the online shopping at first, __50__ is now the most ways to make purchases in China．You can buy anything you need without leaving your homes．