单项选择题

A．To see films.
B．To read books in the library.
C．To attend lectures.
D．To visit the Association.
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单项选择题
The space agencies are reluctant to open up space to tourists.
A．Y
B．N
C．NG
单项选择题
This passage is concerned mostly with ________.
A．the free enterprise system in America
B．the difficulty of living on a fixed income
C．innovative techniques in food processing
D．the advances of advertising techniques
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