（1）What can children do at their homes to protect the Earth？
A.Take a short shower.
B.Clean the rooms.
C.Help their parents do housework.
（2）Which of the following is not mentioned （提及） about protecting the Earth at school？
A.Picking up rubbish.
B.Planting trees.
C.Loving the trees and grass in school.
（3）How many ways are there to protect the Earth at school？
A.Two.
B.Three.
C.Four.
（4）What are they talking about？
A.The ways to learn English.
B.The ways to save water.
C.The ways to protect the Earth.