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【简答题】
What does “green product” usually refer to?
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【单选题】What is the main substance of polluted air?
A.
Toxic chemicals.
B.
Poisonous dirt.
C.
Dirty animals.
D.
Harmful materials.
【单选题】Why is the World Environment Day celebrated?
A.
To raise awareness of importance of living on earth.
B.
To raise awareness of the need to protect environment.
C.
To ask people to be nice residents on the planet.
D.
To help people to be more confident about the environment.
相关题目：
【单选题】What is the main substance of polluted air?
A.
Toxic chemicals.
B.
Poisonous dirt.
C.
Dirty animals.
D.
Harmful materials.
【单选题】Why is the World Environment Day celebrated?
A.
To raise awareness of importance of living on earth.
B.
To raise awareness of the need to protect environment.
C.
To ask people to be nice residents on the planet.
D.
To help people to be more confident about the environment.
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