题目

先通读下面的短文，掌握其大意，然后根据短文内容和所给首字母，在空格内填入一个适当的词，使短文意思完整。所填单词在题后横线上必须完整写出。Earth Hour started in Sydney o(1) March 31, 2007. M  (2)  than two million homes and Businesses turned off their lights for an hour. A year 1 (3)    , in 2008, Earth Hour became the world's activity and was supported by _m( 4 )_ of people from thirty-five countries. In 2009, over two thousand cities in the world took part in it, and Earth Hour came to China.  The purpose of the activi15．阿克库勒湖位于新疆阿勒泰地区（阿尔泰山南麓，准噶尔盆地北缘），上游冰川中的冰碛（冰川沉积的岩块物质）经冰川运动，被挤压，研磨成白色的粉末带入河流，进入湖泊使湖水成白色称“白湖”，读该湖附近的等高线地形图，回答下题．根据材料信息，可以推测下列说法正确的是（　　）A．白湖为内流湖，流量的变化受气温的影响大B．与④河相比，③河流量季节变化小C．A处与B处之间等高线稀疏，地形平坦，完全可以通视D．引起湖水呈现白色的主要地质作用为流水的侵蚀、搬运及冰川的搬运作用