Bill was ________ (踢) a ball in the yard when I saw him.
This is our classroom and________ (你们的) is across the hall.
Behaving________ (礼貌地) costs nothing, but it brings a lot.
Now all the e-bike riders in Ningbo________ (必须) wear helmets while riding.
Our school ________ (邀请) several heroes to the graduation ceremony last year.
Because of the COVID-19, only a few________ (市场) were open in our city last spring.
