According to the United Nations, an aging society refers to one ____ 10 percent or more of the population is over 60, or 7 percent or more is over 65.
Come and see me whenever ____.
As we can see, the prices of vegetables _____ according to the season.
I felt very tired when I got home. and I _______ straight to bed.
Once the new rules are made,what matters much next is how they will be________to all the members of the club.
Nowadays people are more concerned about the environment _______ they live.