单项选择题
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A.The destruction process of ozone layer is slowing down.
B.The ozone layer has been destroyed seriously.
C.Ozone layer can protect us from strong radiation from the sun.
D.Ozone is produced by waste gas.
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单项选择题
A.The boss was hard to get along with.B.The chances for advancement were limited.C.The job was not well paid.D.He would like to try something new.
A.The boss was hard to get along with.
B.The chances for advancement were limited.
C.The job was not well paid.
D.He would like to try something new.
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