一、语法选择 （共15小题，每题1分，满分15分）
Mobike---it’s a bike showing network where users search for a ride through an App. Mobike 1 in shanghai at the end of last year. 2 December 2016, Shanghai became 3 bike- share city in the world. And then Mobike recently expanded to Beijing, Guangzhou and Shenzhen. They are becoming 4 popular, especially among white -collar workers during rush hours. For that reason, a large number of bikes 5 in the streets. The bike ride’s record has reached about twenty 6 on a single day .
Mobike is 7 convenient that the users can find and leave bikes wherever they’d like. The users 8 have the company’s mobile’s APP just need to use their phones 9 the QR code (二维码) on the bike, and
