All the students in my class can’t ______ the math problem. It’s too difficult for us.A. work on B. work out C. work for
They told me it would be cheap, but , it cost me nearly 5,000 dollars.
Everyone except Tom and Mike Kunming before.
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.