单项选择题

What is main purpose of the passage（）

A．To outline contrasting types of economy.
B．To explain the science of economics.
C．To argue for the superiority of one economics.
D．To compare barter and money exchange markets.

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单项选择题

Which of the following is the main purpose of this announcement（）

A．To tell campus personnel of the new library services.
B．To announce the new movies on campus this summer.
C．To notify university people of important schedule changes.
D．To remind students to validate (使生效) their identification cards.

单项选择题

Which of the following is the best title for passage（）

A．Bodily Communication.
B．Bodily Actions.
C．Spoken Language.
D．Conversations.