单项选择题

A．The organization of a conference.
B．The decoration of the conference room.
C．The job of cleaning up the dining-room.
D．The cost of renting a conference room.
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多项选择题
Each year 500,000 space tourists could be flying into space if ticket prices could be lowered to________.
Each year 500,000 space tourists could be flying into space if ticket prices could be lowered to________.
单项选择题
According to the first paragraph, the chances in the business environment in the past decades can be attributed to ________.
A．technological advances
B．worldwide economic disorder
C．the fierce competition in industry
D．the globalization of economy
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