单项选择题

The most difficult problem we faced with is to reduce China’s population to less than 1 billion within 20 years（）

A．现在摆在我们面前最艰巨的问题就是在20年里把中国人口降低到10亿。
B．我们所面临的最艰难的问题是在20年里使中国的人口减少10亿。
C．我们所面临的最艰难的问题是在20年里把中国人口降低到10亿以下。
D．最艰巨的问题摆在我们面前就是在20年里把中国人口减少10亿。

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热门试题

单项选择题

Why did the country mentioned in the passage suffer from floods and starvation（）

A．Because an empire was set up.
B．Because the empire fell to pieces.
C．Because it lost all its trees.
D．Because too much had been spent on wars.

单项选择题

Why do forests in many parts of the world slowly disappear（）

A．New trees are not looked after properly.
B．Many trees have been cut down by man.
C．Man has not paid enough attention to planting trees.
D．All of the abov