According to a survey, the average number of (日常的)steps of people across the world is 4,961.
Our manager greeted the guest with a smile at the entrance.(polite)
For your ,smoking is not allowed during the whole flight.(safe)
Failure isn't always bad.It can teach you lessons.(use)
My school is going to have an open day on the of next month.(ten)
Last week the students went skating and enjoyed very much.(them)