文章大意：本文通过历史回顾和科学分析，提醒人们多关注New Madrid地区频繁的地震。

　　1．This passage is mainly about________.

　　A. the New Madrid fault

　　B. the San Andreas

　　C. the causes of faults

　　D. current scientific knowledge about faults

　　答案：A　主旨大意题。由本文第一段的最后一句话“But how many people know about the equally serious New Madrid fault in Missouri? ”可知。

　　2．Which of the following pictures best describes the type of the New Madrid fault?

　　答案：B　细节理解题。本文第四段和第五段内容可以判断The San Andreas fault是水平地震，而The New Madrid fault是垂直地震，所以B项正确。

　　3．This passage implies that________.

　　A. horizontal faults are more dangerous than vertical faults

　　B. vertical faults are more dangerous than horizontal faults

　　C. a lot of people would die if the 1811 New Madrid earthquakes happened today

　　D. the volcanoes that caused the New Madrid fault are still alive.

　　答案：C　推理判断题。本文无A、B两项相关内容；根据第五段中第二句“Suddenly, the volcanoes cooled and the rock collapsed, leaving huge cracks. Even now, the rock continues to settle downwards”可以排除D项；根据第三段第三句“Few people were killed in the New Madrid earthquakes, probably simply because few people lived in the area in 1811”可以推测答案为C。

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