(51 ) It's a day to celebrate, a time to educate, and a way to make a difference.Earth Day was first observed on April 22, 1970.The tradition began in the United States and is now an international focal point for people who are concerned about the environment.

Imagine a time before the Clean Air Act, the Clean Water Act, the Endangered Species Act,and even the Environmental Protection Agency.Hot topics of the time were industrial pollution, nuclear accidents,oil dependency,pesticides,and a variety of social issues.However,policymakers were not yet acting on many important environmental problems.

Earth Day grew out of grassroots action and institutional Support.Student leader Denis Hayes and Wisconsin Senator Gaylord Nelson were two key organizers for the first event.Over 20 million concerned citizens rallied for clean air and water.College students were a major force in the campaign, although participants of all ages were involved.Still, we cannot really credit a handful of individuals for the success of Earth Day.After all, a major message of Earth Day is that every single person has an important role in the environment.

(52) The first Earth Day was very successful, inspiring the passage of congressional protection for air, water, and endangered species.Momentum from the demonstration also fueled the formation of the Environmental Protection Agency.

Thirty years later, the focus has changed but the urgency remains the same.Due to increasing amounts of scientific evidence that fossil fuels are changing the global climate, the theme for Earth Day 2000 is Clean Energy.The four major goals of Earth Day 2000 are clean cam, clean power,clean air, and clean investments.

26.April 22nd, 2000 is the __________ years'anniversary of the Earth Day.

A.30th

B.20th

C.10th

D.100th

答案：A

提问的是2000年4月22日是地球日的多少周年纪念日。回答用数字表示的细节时，需要进行简单计算。从原文的一段我们可以知道，地球日早1970年4月22日在美国开始，刚好是30年纪念日。所以，选项A为本题的答案。

27.__________ originated the Earth Day.

A.College students

B.Policy makers

C.Ordinary people

D.Denis Hayes

答案：C

这个问题答案需在三段里找出。该段一句告诉我们，地球日是群众自发活动，并由社会机构支持的。学生领袖Denis Hayes和威斯康星州议员Gaylord Nelson是一次活动的主要组织者;200多万市民聚集起来，呼吁干净的水源和空气。各个年龄阶层的人都参加了这次集会，大学生在这次活动中是主要力量，但是我们不能确切地说地球日的成功归为哪一部分人。由这一段话的意思我们可以得知，地球日的创建是集体的结果，并不是由哪一个人创建的。所以，正确答案是C。

28.Which of the following is the immediate effect of the first Earth Day?

A.The Environmental Protection Agency was founded

B.Congressional Protection for water was passed

C.There are more demonstrations followed

D.Denis Hayer published his Clean Energy Now

答案：B

本题的答案含在文章的四段中。这段话的意思是一个地球日极为成功，国会因此而通过了对空气，水，受害生物保护法;游行的势头也推动了环保机构的成立。由此可见，它直接影响的是B(国会通过了水保护法);因此，答案为B。

29.Which of the following is NOT the goal of Earth Day 2000?

A.Clean air

B.Clean water

C.Clean automobiles

D.Clean investment

答案：B

本题提问的是以下哪一个不是2000年地球日的目标。所给的四个答案分别为：A(空气净化)，B(水净化)，C(汽车净化)和D(投资净化)。通过原文后一句我们可以知道，2000年地球日的目标是汽车净化，能源净化，空气净化和投资净化。由此可知，只有选项B不属于其内容。所以,B为本题答案。

30.Earth Day is a day to__________.

A.increase fossil fuels

B.purify the w~iter

C.solve social issues

D.protect environment

答案：D

从全文一段的后一句我们可以知道，源于美国的地球日今天是所有关心环境问题的人们关注的焦点。而且，整篇文章也从地球日的起因及其所产生的一系列影响告诉我们，它是一个保护环境的日子。所以，正确答案为D。

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