chọnn đáp án đúng measured in a few nanometres (one nanometre is a millionth of a millimetre), meaning that how it works can only,be visible when seen under a microscope. [III] It was the American theoretical physicist Richard Feynman who,set the quest in motion at the beginning of the 1960s, but the "nano" catchphrase was coined in the 1990s by Dr.,Eric Drexler, who spurred scientists on through a series of speeches and a book entitled "Engines of Creation:,The Coming Era of Nanotechnology".[IV],According to nanoscientists, one application of nanotechnology that will make the biggest splash in the media,will be the gloves and the boots that will allow rock-climbers to take their sport to previously-undreamed-of,heights. But the technology could also be used in surgery to keep the edges of wounds together without the,need of stitches. There will also be a huge potential in the manufacturing sector to stick millions of components,together tighter than ever before without glues or screws.,Question 31. What does the word it in paragraph 1 refer to _____?,A. adhesion B. geckos' toe C. a hole D. the glass,Question 32. According to the passage, what can be inferred about the future applications of nanotechnology?,A. Scientists are unclear about how nanotechnology will be used in real life.,B. Nanotechnology will mostly be used in manufacturing rock-climbing gears.,C. Thanks to nanotechnology, stitches, glues and screws will be unnecessary.,D. Possible applications of nanotechnology cover a range of areas and sectors.,Question 33. What is the word spurred in paragraph 2 OPPOSITE in meaning to _____?,A. dissatisfied B. discouraged C. discharged D. disappointed,Question 34. According to the passage, which is NOT mentioned about Dr. Eric Drexler?,A. His publications inspired later generations of scientists.,B. Apart from being a writer, he was also a public speaker.,C. He laid the groundwork for the field of nanotechnology.,D. He was the first to introduce and popularize the term "nano".,Question 35. The word reproduce in paragraph 2 is CLOSEST in meaning to _____.,A. recreate B. regenerate C. renovate D. regulate,Question 36. Which of the following sentences best summarizes paragraph 1?,A. The title "the world's best climber" should belong to geckos, not spiders.,B. Geckos are masters of using nanotechnology to stick themselves to any surface.,C. Geckos' unbelievable climbing ability still remains a mystery to humans.,D. Geckos' amazing climbing ability has something to do with nanotechnology.,Question 37. Which of the following best paraphrases the underlined sentence in paragraph 3?,A. Nanotechnology will likely keep stitching surgeons on the edge because their skills will be made redundant.,B. Nanotechnology could make stitching surgeries redundant, allowing open wounds to close naturally.,C. Patients with open wounds could be treated at home without having to undergo a stitching surgery.,D. Surgeons could use stitches to close open wounds instead of having to rely on nanotechnology.,Question 38. According to paragraph 1, which is TRUE about geckos?,A. The secret to their climbing ability is the hook-like claw at the end of their toes.,B. They can stick themselves to the surface of glass with just one toe.,C. Their bodies are strong enough to support a person weighing 100 kg,D. Few animals in the animal kingdom can outclimb geckos, except for spiders.,Question 39. Which of the following sentences best summarizes the whole passage?,A. Nanotechnology is still at an early stage of development as scientists are starting to take interest in the,geckos' amazing climbing ability; but possible.,B. Inspired by the superpower of geckos, scientists have been able to crack the code of nanotechnology and are,looking to develop a range of transformative applications.,C. Scientists have been able to unlock the secret behind nanotechnology by imitating the geckos' amazing,climbing ability, which is drawing a lot of attention from the media.,D. It took scientists a long time to understand the science behind geckos' climbing superpower, and it turns out,that replicating this ability in real life is quite easy.,Question 40. In which of the spaces numbered in the text does the following sentence best fit?,"Currently, they are looking for an alternative material with which to manufacture the stickiest synthetic,surface ever.",A. [I] B. [III] C. [IV] D. [II]

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31. B. geckos' toe
32. D. Possible applications of nanotechnology cover a range of areas and sectors.
33. B. discouraged
34. C. He laid the groundwork for the field of nanotechnology.
35. (There's no "reproduce" in the text, so I'm assuming it's a mistake. If you meant "spurred", the closest meaning would be A. recreate, but that's not the best fit either.)
36. D. Geckos' amazing climbing ability has something to do with nanotechnology.
37. B. Nanotechnology could make stitching surgeries redundant, allowing open wounds to close naturally.
38. B. They can stick themselves to the surface of glass with just one toe.
39. B. Inspired by the superpower of geckos, scientists have been able to crack the code of nanotechnology and are looking to develop a range of transformative applications.
40. C. [IV]

(Please note that the provided text is incomplete, so some answers might not make perfect sense in the context of the whole passage.)