4．What is the main idea of the last paragraph?

　　A．Provide the background of the green plan.

　　B．Stress the purpose of Walmart's green plan.

　　C．Present the risk that Walmart is facing nowadays.

　　D．Analyze the similarity between Bill Gates and Scott.

　　解析：选B　段落大意题。根据最后一段第二句"He acknowledges ... global warming."可知，这段主要分析沃尔玛采取这些措施的目的。

　　Ⅱ.语法填空

　　Students in many British schools usually wear their uniforms on weekdays. However, 1 (recent) the students at LVS Ascot Junior School in England were wearing pajamas (睡衣). They did this not simply for fun, 2 for a local charity called Christopher's Smile.

　　Christopher's Smile 3 (set) up in 2008 by Karen & Kevin Capel, 4 only son Christopher died of cancer at a young age. They hoped their charity would help pay 5 more research into children's cancers. Since then, the charity has raised lots of money and gotten more and more 6 (volunteer). Every year, thousands of people join 7 (differ) activities such as charity walk or run to show their support for Christopher's Smile.

　　 8 (dress) in their pajamas, the students at LVS Ascot Junior School also wanted to do something for the sick children. "We organized the event 'Pajamas Day' 9 (support) Christopher's Smile. We wanted to raise money in a way that the whole school could join in，" said the organizers. Both the students and their teachers took 10 active part in the event with great interest. Together they raised some money and had a good time as well.

　　语篇解读：最近英国LVS Ascot小学学生穿睡衣上学。他们不只是为了娱乐，而且是为了当地一个叫克里斯托弗的微笑的慈善活动。这个慈善机构是由克里斯托弗的父母创立的，它为儿童癌症研究募捐。人们通过慈善步行、跑步等支持这个活动。LVS Ascot小学学生通过"睡衣日"活动来支持这种慈善活动。

　　1.recently　设空处修饰整个句子，故填副词recently。

　　2．but　not ... but意为"不是......而是"。

　　3．was set　主语Christopher's Smile是谓语动词set up所表示动作的承受者，故用被动语态；由in 2008可知应用一般过去时。

4．whose　设空处引导非限制性定语从句修饰先行词Karen & Kevin Capel，且在从句中作定语，故填whose。