Question

     Mother Nature knows best. But she's not always generous with her secrets. Sometimes she only tells them to the most careful observers.

George de Mestral was a Swiss engineer who enjoyed walking with his dog in the woods. One day,after a walk,he looked down and saw some seeds (種子) stuck to his trousers. He was a little -bit angry because the seeds were hard to remove. He pulled a few of the seeds off of his trousers and examined them under a microscope（顯微鏡） What he saw amazed him: tiny hooks (鉤子) on the ends of the seeds. De Mestral saw a new way to stick things together and keep them attached.

    He was inspired to turn his accidental discovery into a useful product. He borrowed money from a bank,gave up his job,and gave all of his time and energy to the task. At first,people refused to take him,and the idea,seriously. He took his idea to a weaving center,where he did manage to get the help of one weaver,who made two products out of cotton that worked. However, the cotton wore out quickly. Finally,by using nylon instead of cotton,he made his invention work. It took ten years to develop it. He called it Velcro.

Today,Velcro is used everywhere: in shoes,purses,and children's toys. We can thank de Mestral for discovering and developing a wonderful way to attach things. But the real thanks should go to nature for making the secret known.

21. What gave de Mestral the idea for inventing Velcro?

   A. The thick woods.       B. The sticky seeds.

   C. His trousers.          D. His dog

22. What does the underlined part “the task” in Paragraph 3 refento?

   A. Looking for a new job.

   B. Finding a useful material.

   C. Raising enough money for his experiment

   D. Developing a produet to stick things together.

23. What is the best title for the text?

   A. Velcro: An Invention Inspired by Nature

   B. Motlier Nature: The Perfect Designer

   C. Lessons Learned from Nature

   D. The Mother of Invention

Answer 1

21. B 22. D 23. A

21. B.細(xì)節(jié)理解題。根據(jù)第二段的描述可知，deMestral散步完后發(fā)現(xiàn)褲 子上粘上許多種子，而且這些種子很 難清除掉，這讓他感到好奇，因此在 顯微鏡下觀察其結(jié)構(gòu)。也正是對于 這些種子的觀察讓他有了重大發(fā)現(xiàn) 并萌生了發(fā)明一種用來粘合物品的 材料。

22. D.篇章結(jié)構(gòu)題。第三段中的the task實(shí)際上指的是上一句中的turn his accidental discovery into a useful product,由此可知答案。

23. A.標(biāo)題歸納題。文章以Mother Nature knows best引出接下來要講述 的故事，然后在文章的主體部分(第 二、三段) 詳細(xì)描述了瑞士工程師是 如何受到大自然的啟發(fā)發(fā)明尼龍搭扣的故事。最后—段末句 But the real thanks should go to nature for making the secret known 與文章開頭 形成首尾呼應(yīng)，說明大自然給予人類的啟示。因此,A項(xiàng)作標(biāo)題概括了文章主旨。