【题目】 Wastage can be reduced by establishing standards ________which we can monitor the performance of travel agents．

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]Local people usually see tourism as _______.

• A、an opportunity to make a profit
• B、an opportunity to create jobs
• C、a cultural and employment factor
• D、a wealth factor in the economy of their jurisdictions

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3、[单选题]The entire tourism industry rests on a base of_______.

• A、national economy
• B、natural resources
• C、hotel and transportation
• D、government policy

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4、[单选题]Ecotourism is one of the most rapidly growing form of specialized travel in the West，with central American countries，such as Costa Rica，________the principal destinations at present．

• A、be 
• B、to be 
• C、being  
• D、been

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5、[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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