Millie stood by the gate of the station with a purse in her hand she could find the owner of it
—I used to play tennis,but now I’m on the swim team.—________.
—________you________go to school by bike?—Yes.But now I usually go to school by bus.
My grandmother________a lot of changes in Tianjin since she came here.
—We’re supposed to recycle paper and bottles.It can help the environment.—________.It can save money,too.
The number of books in the bookshop is about 10,000 and a number of them________about science.