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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．Building Hotels in Space
C．Flight Regulations in Space Travels
D．Cost of Space Traveling
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热门试题

单项选择题The phrase bread-and-butter business (Line 1, Para. I ) most probably means _________.

A．a business to sell bread and butter
B．a business to produce bread and butter
C．the business to make a living
D．a traveling agency

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．$10,000.
C．$98,000.
D．$22,000.