1．According to the passage，we can to help reduce climate change effect.

　　A．make good use of water

　　B．buy local food and drink

　　C．save electricity

　　D．go around on foot

　　C　[细节理解题。根据While on holiday中的"Switching off any air­conditioning，heating and lights will help reduce climate change effect."可知，减少气候变化影响可以从节约用电着手。]

　　2．We should check the gifts and foods before buying because ．

　　A．sometimes they are of poor quality

　　B．they may not be typical local products

　　C．some of them will do harm to our health

　　D．they may be made from endangered animals or plants

　　D　[细节理解题。根据Endangered species部分的第一、二句可知，答案为D。]

　　3．We can infer from the passage that ．

　　A．it is not easy for people to travel abroad

　　B．not everyone can tell an illegal souvenir

　　C．green holidays have been accepted by people

　　D．volunteer work is a must for protecting natural habitats

　　B　[推理判断题。根据常识并结合Endangered species部分中的第二句"...but if you doubt，avoid animal and plant gifts."可知，并不是每个人都能辨别非法纪念品。]

　　B

　　Since the first Earth Day in 1970, Americans have gotten a lot "greener" toward the environment. "We didn't know at that time that there even was an environment, let alone that there was a problem with it，"says Bruce Anderson, president of Earth Day USA.

But what began as nothing important in public affairs has grown into a social movement. Business people, political leaders, university professors, and especially