单项选择题

What is the main idea of the last paragraph

A．It shows the reason why people think some colors are warm and others are cool.
B．Warm colors remind people of warm days.
C．Cool colors remind people of cool days.
D．People have an agreeable opinion of warm colors and cool colors.

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单项选择题

What is the main idea of the passage

A．Animals move in order to find food more easily.
B．The migration of the fish called "salmon" is the most famous migration.
C．Living things move from one place to another because they like to travel.
D．Sometimes we know why and how living things move from one place to another, but sometimes we don't.

单项选择题

Which of the following is NOT true

A．Thomas Jefferson enriched the collection of the Library.
B．The Library of Congress is in Washington D. C.
C．The Library of Congress has books on all subjects from the very beginning.
D．You can ask the experts in the Library of Congress all kinds of questions by phone.