四级考试中，阅读部分分为三种考察模式：快速阅读、选词填空和篇章阅读。在考场中每一分值都是弥足珍贵的，而每错一道题目，则相应失分也非常惨重所以，同学们在四级备考过程中，有效的提高阅读理解能力是十分重要的。环球博海小编针对这一现象特搜集了2013年英语四级阅读理解能力训练(11)，希望能够帮助大家更好的备考12月的四级考试。

　　Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hour's 11 one of the scientists wrote in his book, "Look here for 12 metal. " Scientists in another airplane, flying over a mountain region, sent a 13 to other scientists on the ground, "Gold possible. " Walking across hilly ground, four scientists reported, "This ground should be searched for metals. " From an airplane over a hilly wasteland a scientist sent back by radio one word, "Uranium. "

　　None of the scientists had X-ray eyes: they had no 14 powers for looking down below the earth's surface. They were 15 putting to use one of the newest methods of 16 minerals in the ground—using trees and plants as 17 that certain minerals may lie beneath the ground on which the trees and plants are growing.

　　This newest method of searching for minerals is 18 on the fact that minerals deep in the earth may 19 the kind of bushes and trees that grow on the surface.

　　At Watson Bar Creek, a brook six thousand feet high in the mountains of British Columbia, Canada, a mineral search group gathered bags of tree seeds. Boxes were filled with small branches from the trees. Roots were dug and put into boxes. Each bag and box was 20 marked. In a scientific laboratory the parts of the forest trees were burned to ashes and tested. Each small part was examined to learn whether there were minerals in it.

　　A. signs B. sufficiently C. locating D. affect

　　E. merely F. magic G. hints H. carefully

　　I. finding J. message K. flight L. probable

　　M. revealing N. based O. information

　　参考答案：

　　11. K 12. L 13. J 14. F 15. E 16. C 17. A 18. N 19. D 20. H