[单选题] The tour operator's brochure is a/an _____tool, being the main influence on the customer's decision to buy.

1、[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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2、[单选题]Thomas Cook was considered the father of ______.

• A、modern tourism
• B、railway industry
• C、hotel industry
• D、aviation industry

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3、[单选题]In 1981 the WTO has urged national tourism organizations ______ foreign nationals in their country as domestic travelers.

• A、to include
• B、included
• C、not to include
• D、including

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4、[单选题]The sum of all incomes in a country is called the________ ．

• A、economic income
• B、productive income
• C、financial income
• D、national income

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5、[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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