The air in Beijing is getting much ______ now than a few years ago.
You are under 18 years old, so it is for you to join the Trailwalker.
Old people shouldn’t . In fact, they have stronger and clearer minds.
—Let me help you carry the box, Granny. —Thank you, Li Ping. It’s very nice you me.
—Do you know when he back tomorrow? —Sorry, I don’t know. When he back, I will tell you.
—I’m afraid a car is too expensive for me. —But more and more Chinese can to buy one.