单项选择题

What is the passage mainly about ？（）

A．Environmental pollution and protection.
B．Taxes and services for the public.
C．Police efforts to protect people.
D．People’’s attitude toward taxes.

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单项选择题
What did Columbus bring back on his second trip ？（）

A．Fried potatoes.
B．Tomato juice.
C．Sweet corn.
D．Chocolate beans.
问答题
Which word in the first two paragraphs best explains why many women have to work ？（）
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