[单选题] technological rather than psychological

1、[单选题]The realization of one's desire to travel depends on many complex social and political factors, including the social _____ of the destination.

• A、change
• B、awareness
• C、policy
• D、stability

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2、[单选题]In October 1970, the Rail Passenger Service Act ______.

• A、put into practice
• B、was put inot practice
• C、was practice
• D、practised

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3、[单选题]Tourism has the _____ to help bridge the psychological and cultural distances that separate people.

• A、potential
• B、profit
• C、benefit
• D、energy

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4、[单选题]Airlines will________ to allow for the high number of________ ，but must exercise caution．

• A、overbook, independent travelers 
• B、overbook, no-shows
• C、underbook，business travelers 
• D、underbook，repeat travelers

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5、[单选题]With the invention of _____ in 1853, hotels began to expand upward.

• A、telephone
• B、electricity
• C、elevators
• D、cars

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