单项选择题


Questions 11 to 18 are based on the conversation you have just heard.

A．The class thought the demonstration was too complex.
B．Too many students showed up.
C．The professor didn’t show up.
D．The professor cancelled it.
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单项选择题
Which of the following is the best title for the passage
A．Take Vacations in Space
B．Flight Regulations in Space Travels
C．Building Hotels in Space
D．Cost of Space Traveling
单项选择题
How much is the 2-hour space tour for each person according to Space Adventures in Arlington
A．＄1 million.
B．＄98,000.
C．＄10,000.
D．＄22,000.
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