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43. The underlined word blurry in the second paragraph probably means   .

  A. obvious     B. possible   C. clear         D. unclear

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42.When things far away seem indistinct(模糊不清) , one is probably   .

  A. near-sighted   B. far-sighted  C. astigmatic      D. suffering from cataracts

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41. We should take good care of our eyes   .

   A. only when we can see well

  B. only when we cannot see perfectly

  C. even if we can see well

  D. only when we realize how important our eyes are

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29. A. possibility      B. feasibility         C. hope             D. result

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28. A. every          B. no              C. this              D. another

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27. A. simple         B. easy             C. necessary          D. difficult

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26. A. prepare        B. regret            C. decline           D. expect

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25. A. offer          B. hesitate           C. refuse            D. mean

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24. A. work        B. live             C. play             D. eat

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