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Which of you two hands do you use most? Very 26 of us can use both of our hands equally（相等的）well. 27 of us are right-handed. Only about five 28 out of a hundred are left-handed. New-born babies can hold things 29 either of their hands, but 30 about two years they usually like to use their right hands. Scientists do not know 31 his happens. They 32 that we inherited（遺傳）this from our animal ancestors（祖先）but this may not be 33 . Monkeys are our closest relatives（親屬） in the animal 34 . Scientists have found that monkeys prefer to use one of their hands more than 35 , but it can be 36 hand. There are as many right-handed monkeys 37 there are left-handed ones.
Next time you visit the zoo, 38 the monkeys carefully. You will see that some of the will use their left hands. But most humans（人類(lèi)）use their right hands 39 and this 40 life difficult for the left-handed people. We live in a right-handed world.
26. A. few B. a few C. little D. many
27. A. Some B. Any C. All D. Most
28. A. person B. people C. man D. woman
29. A. by B. in C. with D. on
30. A. in B. after C. before D. for
31. A. when B. why C. that D. what
32. A. hoped B. heard C. learned D. thought
33. A. real B. true C. wrong D. good
34. A. land B. earth C. world D. country
35. A. other B. others C. another D. the other
36. A. either B. any C. every D. the other
37. A. like B. as C. and D. while
38. A. look B. see C. watch D. enjoy
39. A. well B. better C. best D. the best
40. A. lives B. brings C. makes D. keeps
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