4．The text mainly discusses the relationship between

　　.

　　A．adventures and cultures

　　B．technology and traveling

　　C．young people and their family

　　D．Canadian travelers and Europeans

　　答案　B

　　解析　主旨大意题。综览全文，作者主要谈论的是科技对旅行的影响。文中的the European experience...by today’s technology及technology­based backpacking是解题的线索。

　　Ⅱ.阅读填空

　　Summer safety tips for children

　　Summer is a time for having fun in the sun！Children should be able to have fun but they should also be safe.Here are some helpful tips all parents should discuss with their children.

　　Never talk to strangers

　　5

　　If someone suspicious(可疑的) that they don’t know comes up to them，they should immediately either run away if they are alone or go somewhere where there are other people.

　　Keep cool in the heat

　　If your children must be outdoors in extreme heat，make sure that activities should be limited to 15 minutes.

　　6

　　Remember to ask them to drink some every 20 minutes even if they do not feel thirsty.

　　Water safety

　　For children who cannot swim，they should not go into the deep area of the water.And they should also play at places where there are lifeguards.This way if something were to happen，they would have someone there to help them.

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