50．Why does the author write the passage?

　　A．To teach us a good lesson.

　　B．To tell us the right attitude to life.

　　C．To advise us to forget our worries.

　　D．To stop us wandering along the aisles.

　　解析　写作意图题。作者试图告诉人们要树立正确的人生观，不要懊悔过去，也不要恐惧未来，要好好珍惜和享受现在。

　　答案　B

　　E

　　UK residents take over 40m holidays abroad and more than 100m overnight stays in this country each year.Choices made about where to go，how to get there and what to do while there can either benefit or harm the environment.

　　While on holiday

　　Many of the things you can do to be greener on holiday will be the same things you can do at home—but there are also some extra things too，like avoiding gifts made from endangered species.Here are some suggestions：

　　·Making the most of locally produced food and drink，and local activities and attractions will support people in the area you

　　are visiting and reduce the need for further environmental impact from transport；

　　·Switching off any air conditioning，heating and lights when you're not using your accommodation will help reduce climate change effects；

　　·Try not to waste water—some countries suffer from water shortages and saving water can help avoid damage to natural habitats.

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