BACCB
1.根据It is a global event …… pay more attention to climate change.这句可知选B。
2.根据短文第一句,Lights went out for an hour ……on March 28 for Earth Hour 2010. went out熄灭的意思,故选A。
3.根据这句Australia first held Earth Hour in 2007可知选C。
4.在第一段中提到悉尼歌剧院,海港大桥、埃菲尔铁塔和伦敦议会两院,最后一段提到上海东方明珠电视塔和北京的鸟巢,共有六个著名地标,故选C。
5.根据It is a global event created by the WWF(World Wildlife Fund) t……这句可知选B。