—The air in Nanjing was much better during the Spring Festival because people were not allowed to let off firecrackers. —I agree. Everyone should do what he can the environment.
Each year quite a lot of food________ around the world.
Earth Day_______in 1970 to tell us to protect our planet.
I hope I can do something to support . It’s meaningful and important to save some endangered animals.
We should ________good eating habits.
—Dad,I was the first to reach the top of the hill. —Good job, Mary. I’m_______of you.