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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【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.
【单选题】What is the man's concern about China's environmental policy?
A.
How to make the policy.
B.
How to understand the policy.
C.
How to learn the policy.
D.
How to implement the policy.
【单选题】Why does the man think all countries should work together?
A.
Because air pollution is serious.
B.
Because air pollution is on a global scale.
C.
Because air pollution is terrible.
D.
Because air pollution is worth studying.
【单选题】When did the woman begin to feel that we should love animals?
A.
When she was a ki
B.
When she became an adult.
C.
When she visited Afric
D.
When she went to zoos.
【单选题】What information can we get from the man?
A.
Affordable methods are more practical.
B.
Expensive methods are more practical.
C.
Easy methods are more practical.
D.
Advanced methods are more practical.
【单选题】Why is some cities' environment deteriorating according to the man?
A.
Because there are too many people.
B.
Because there are few trees.
C.
Because there is little clean water.
D.
Because there is too much pollution.