单项选择题

What's the author's attitude towards the waste of the earth's resources

A．Negative.
B．Neutral.
C．Positive.
D．Enthusiastic.
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单项选择题
The word virtue (the last sentence) most probably means ______.
A．an advantage
B．a shortcoming
C．an excellent characteristic
D．an outstanding ability
单项选择题
Products used to be made to last ______.
A．for at least five years
B．for ten years
C．for as long as you take good care of them
D．for your whole life
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