单项选择题

Why did the man resign from the engineering firm ？（）

A．He was not happy with the new director.
B．He was not qualified to be an engineer.
C．He wanted to travel.
D．He found his job boring.

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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.
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.
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