【题目】 Take a piece of hair from your head. Ouch! It may be long, _______ it's not wide. Three scientists spent over 30 years _______ a kind of machine. This kind of machine is about a thousand times _______ than the width of one piece of your hair. These machines are _______ small that they can only be seen under a microscope(显微镜)!They _______ nanomachines(纳米机器).

Because of their hard work, the three scientists _______ the 2016 Nobel Prize in Chemistry. They are all European. Sir J. Fraser Stoddart, one of the scientists, told reporters that he thanked _______ other scientists from 24 different countries for helping make this prize _______. He said he once brought a chocolate Nobel Prize to his daughter from _______ trip to Stockholm. He expected ____________ a real one someday.

What are nanomachines good for? Scientists believe that ____________ the future, nanomachines ____________ help deliver(传送) medicines inside a person's body, or take away things that are making us sick. Mr Feringa compared ____________ work to that of the Wright Brothers. When the Wright Brothers flew their airplane for the first time, some people questioned what airplanes ____________ good for. Now airplanes help us ____________ fast and we use them all the time.

1A. andB. soC. butD. or

2A. inventingB. inventC. to inventingD. invented

3A. the smallestB. smallerC. smallD. smallest

4A. veryB. soC. suchD. quite

5A. are callingB. is calledC. calledD. are called

6A. will winB. wonC. winsD. has won

7A. hundreds ofB. hundred ofC. hundredD. hundreds

8A. possibilityB. possiblyC. possibleD. impossible

9A. aB. anC. theD. /

10A. haveB. to haveC. havingD. to having

11A. inB. forC. atD. on

12A. shouldB. canC. mustD. need

13A. theirB. themC. theyD. theirs

14A. isB. wereC. wasD. are

15A. travelsB. travellingC. travelledD. travel

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