单项选择题

The most urgent problem that still remains unsolved, however, is how to stop water from wasting.

A．然而，仍然没有得到解决的最紧迫的问题是怎样阻止水的浪费。
B．但是，最紧迫的还没有得到解决的问题是怎样阻止水的浪费。
C．然而，仍然没有得到解决的最紧迫的问题是怎么停止水的浪费。
D．最紧迫的问题还没有解决，但是，又怎么能停止水的浪费。
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单项选择题
Why do women live longer than men ______
A．Because women’s pumping power is better.
B．Because women live five years longer than men.
C．Because male’s heart is weaker than female’s.
D．Because the power of women ’ s hearts decreas
填空题
When was Mr. Liu born
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