[单选题] The uniquely combined natural and cultural resource base has become a major ______ for China in its effort to develop tourism.

1、[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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2、[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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3、[单选题]Wastage can be reduced by establishing standards ________which we can monitor the performance of travel agents．

• A、upon 
• B、with 
• C、against 
• D、within

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4、[单选题]Standardization and rigidity are very clear characteristics of ____ tours offered on al arge scale.

• A、international
• B、in-bound
• C、package
• D、business

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5、[单选题]An international tourist is defined as anyone visiting a country, other than that which is his usual place of residence，for________ hours．

• A、more than 48 
• B、more than 24 
• C、less than 48 
• D、less than 24

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