单项选择题

A．It uses nuclear energy.
B．It rests on a cushion of professional air.
C．It flies over magnetically activated tracks.
D．It uses a device similar to a jet engine.
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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
A．To observe people’’s attitude towards strangers.B．To see how people get along with their friends.C．To change people’’s behaviour in social life.D．To find out how shy people are.
A．To observe people’’s attitude towards strangers.
B．To see how people get along with their friends.
C．To change people’’s behaviour in social life.
D．To find out how shy people are.
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