Volunteering is becoming more and more popular in the world because it gives us a/an __________ to value (珍惜) what you have, and focus on the truly important things in our life.
It's really that a tortoise can 150 years old.
My sister has learnt English .
We planted trees last year.
There be a fashion show in our town tomorrow.
If farmers trees and forests, giant pandas nowhere to live.