B.over 200,000 years ago
C.about 770,000 years ago
D.about 2 million years ago
答案:C 细节理解题。由第二段最后一句话“What's important about that date, about 770,000 years ago, is that this was an ice age on Earth.”可知。
2.What is the most important standard for scientists to decide an ice age?
A.The weather conditions.
B.The continuous existence of any large ice sheets.
C.The average yearly temperature.
D.The long period of snowfall.
答案:B 推理判断题。由第四段第三句话“...scientists regard the whole time as one ice age because of the continuous existence of at least one large ice sheet—the one over Antarctica.”可知。
3.Which of the following is TRUE of Peking Man?
A.He is the oldest human being.
B.He used fire to keep warm.
C.He wore formfitting clothes made from fur with simple tools.
D.He might have been shorter and wider than previously thought.
答案:D 推理判断题。由倒数第二段“People in general who live in colder climates tend to be shorter and wider”可推知,北京人可能比我们原先预计的要矮胖,这样才能与当时的气候相适应。
4.The passage can probably be found in________.
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