A. Some expressions about hot weather.
B. The heat wave in the world.
C. Sirius is associated with the hot weather.
D. Death Valley—the hottest place in the US.
【解析】选A。主旨大意题。文中第一段以幽默的方式介绍了今年夏天全球的热浪, 其目的是引出本文的中心, 故B项错误; 第二段的最后一句话是整篇文章的主题句, 故A项正确; C、D两项都是文章中的一部分, 范围小了。
6. According to the passage, how long does“dog days of summer”last?
A. About one month.
B. About two months.
C. About two months and a half.
D. About one month and a half.
【解析】选D。细节理解题。由第三段的第一句In books and newspaper articles, the period from early July to mid-August is often referred to as the“dog days of summer”. 可知“dog days of summer”持续大约一个半月。
7. What caused broken eggshells littered around sidewalks in Death Valley?
A. The hot weather.
B. The curiosity of tourists.
C. The permission of the local government.
D. The origin of the expression.
【解析】选B。推理判断题。由最后一段可以看出好奇的游客为了验证当地的酷热是否能够“fry an egg on the sidewalk”, 不顾当地政府的告诫, 仍然坚持做这项实验, 故B项正确。
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