ys followed the marks that they ________, untilfinally they found their way back to the campsite

New energy-sharing projects _____ in dozens of cities across the country to fuel China’s sharing economy in the next few years.

I arrived late and missed the flight. I____ the traffic to be so heavy.

There is no doubt _______ nearsightedness is a serious problem among the youth of our country.

You are late for class, boy． –Sorry． Inexttime．