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A．how
B．why
C．what
D．which
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单项选择题A．sizeB．contentC．formD．quality

A．size
B．content
C．form
D．quality

单项选择题Which of the following is Not the reason that conservation has never been a strong value7

A．Americans stick to old wasteful habits.
B．Americans believe their country is abundant with natural resources.
C．Many people will lose their jobs on account of conservation.
D．It is difficult to recycle paper, cans, bottles and other goods.