Question

                                       C

                                   ★★★★★

            Big waves are very bad news indeed. History is full of examples of devastation(破坏)The biggest wave ever recorded was the one that hit Alaska in 1958,after a huge landslide (山崩) created a tsunami that peaked at 500 meters above sea level. That's not a misprint: It was more than twice as high as the ：tallest building in Britain today — Canary Wharf Tower. Scientists know how high it was because the giant wave removed trees and soil from nearby mountains up to that ：altitude.

           The Alaskan wave is believed to have been a tsunami caused by a landslide. Italy has been hit by as many as 67 tsunamis in the past 2 ,000 years,though none ：of them was as devastating as the one that killed 230,000;people around the Indian Ocean in 2004.

           It's  useful to tell the differences between tsunamis, which are caused by geological events,and enormous waves generated by weather. But it is probable that both types will become a lot more common as a result of worldwide global warming. The oceans absorb more than 80 percent of the heat added to the climate system. As the waters heat up,wind speeds increase,storms become more violent,polar ice melts,and sea level rises.

           “Now is the time to prepare for great floods,” Lloyd, an editorial in New Scientist,advised. ”In the future,the UK's  coastal cities will be jn jeopardy due to rising sea levels,” reported Lloyd. Similarly,nine out of the world's ten largest cities are located on low-lying coastal land.

            But giant waves are not new. For centuries,sailors told of the existence of enormous waves up to 100 feet high that could appear without warning in mid-ocean and often in perfectly clear and calm weather. Researchers ： had reservations until the' existence of extremely huge waves was confirmed in 1995 in Norway,where an ： 84-foot wave occurred in the sea where the average of the : tallest 33 percent of waves was 39 feet.

9. How did scientists determine the height of the Alaskan wave?

   A. By comparing it with Canary Wharf Tower.

   B. By observing the damaged mountains.

   C. By watching it from a tall building.

   D. By studying the huge landslide.

10. According to the text,more giant waves will be caused by .

Ai tsunamis   B. landslides

   C. climate change   D. rising sea levels

11. The underlined words “in jeopardy” in Paragraph 4 probably mean .

   A. in place   B. in peace

   C. in danger   D. in control

12. What can we infer from the last paragraph?

   A. Giant waves are less common recently.

   B. The biggest wave ever recorded was in Norway.

   C. Enormous waves appear with warning in the ocean.

   D. Researchers had doubts about huge waves before 1995.

Answer 1

9. B 10. C 11. C 12. D

C篇

海上的巨浪具有极强的破坏力，曾让多地遭受巨大的损失。

9. B. 细节理解题。根据第一段中的Scientists know how high it was because the giant wave removed trees and soil from nearby mountains up to that altitude可知，科学家通过观察被毁坏的山峰知道了阿拉斯加巨浪的高度。

10. C. 推理判断题。根据第三段中的But it is probable that both types will become a lot more common as a result of worldwide global warming可知，海啸和巨浪都会因为全球变暖而变得更频繁，所以气候变化会导致出现更多的巨浪。

11. C. 词义猜测题。联系第四段内容可知，海面上升会让海边的城市陷入危险之中，故选C项。

12. D. 细节理解题。根据最后一段中的Researchers had reservations可知，科学家在1995年之前对巨浪的存在存有疑虑。