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Number sense is not the ability to count. It is the ability to recognize a 1 in number. Human beings are born with this ability. 2 , experiments show that many animals are, too. For example, many birds have good number sense. If a nest has four eggs and you remove one, the bird will not 3 .However, if you remove two, the bird 4 leaves. This means that the bird knows the 5 between two and three.
Another interesting experiment showed a bird's 6 number sense. A man was trying to take a photo of a crow（乌鸦）that had a nest in a tower, but the crow always left when she saw him coming. The bird did not 7 until the man left the tower. The man had an 8 .He took another man with him to the tower. One man left and the other stayed, but they did not 9 the bird. The crow stayed away until the second man left, too. The experiment was 10 with three men and then with four men. But the crow did not return to the nest until all the men were 11 .It was not until five men went into the tower and only four left that they were 12 able to fool the crow.
How good is a human's number sense? It's not very good. For example, babies about fourteen months old almost always notice if something is taken away from a 13 group. But when the number goes beyond three or four, the children are 14 fooled.
It seems that number sense is something we have in common with many animals in this world, and that our human 15 is not much better than a crow's.
1. A．rise B．pattern C．change D．trend
2. A．Importantly B．Surprisingly C．Disappointedly D．Fortunately
3. A．survive B．care C．hatch D．notice
4. A．generally B．sincerely C．casually D．deliberately
5. A．distance B．range C．different D．interval
6. A．amazing B．annoying C．satisfying D．disturbing
7. A．relax B．recover C．react D．return
8. A．appointment B．excuse C．idea D．explanation
9. A．fool B．hurt C．catch D．kill
10. A．reported B．repeated C．designed D．approved
11. A．confused B．gone C．tired D．drunk
12. A．gradually B．luckily C．strangely D．finally
13. A．single B．small C．local D．new
14. A．seldom B．temporarily C．merely D．often
15. A．sight B．nature C．ability D．belief
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I am my mother’s third child. When I was born, her doctor gently explained to my mother that my left arm was __36__, below the elbow(肘部). Then he gave her some __37__:“Don’t treat her any __38__ from the other girls. Demand more.” And she __39__!
My mother had to work to __40__ our family. There were five girls in our family and we all had to __41__. Once when I was about seven, I came out of the __42__,“Mom, I can’t peel (削……皮) potatoes. I only have one hand. “You get back to peel those potatoes, and don’t ever use that as a(n) __43__ for anything again!” Of course I could peel potatoes with my good hand, while holding them down with my __44__ arm. There was always a __45__ , and Mom knew it, “If you try hard __46__,” she ‘d say, “you can do anything.”
Once in the second grade, our teacher had each of us race across the monkey bars(高低杠). When it was my turn, I __47__ my head. Some kids __48__ . I went home crying. After work the next afternoon, Mom __49__ me back to the school ground. “ Now, pull__50__ with your right arm”, she advised. She stood by __51__ I practiced, and she __52__ me when I made progress. I’ll never forget the __53__ time I was crossing the bars. The kids were standing there with their mouths open.
It was the way with everything. When I __54__ I can’t handle things, I see Mom’s smile again. She had the heart to __55__ anything. And she taught me I could, too.
36. A. missing B. broken C. diseased D. short
37. A. warning B. medicine C. help D. advice
38. A. badly B. differently C. well D. normally
39. A. did B. refused C. cried D. was
40. A. care B. help C. support D. feed
41. A. pay attention B. work out C. carry out D. help out
42. A. kitchen B. bedroom C. house D. school
43. A. idea B. change C. excuse D. explanation
44. A. lost B. other C. next D. longer
45. A. chance B. way C. time D. success
46. A. enough B. too C. again D. often
47. A. hurt B. nodded C. shook D. turned
48. A. cheered B. whispered C. joked D. laughed
49. A. drove B. took C. sent D. carried
50. A. up B. off C. out D. on
51. A. before B. as C. after D. until
52. A. helped B. raised C. praised D. protected
53. A. first B. last C. wonderful D. next
54. A. admit B. fear C. find D. realize
55. A. face B. teach C. learn D. solve
查看习题详情和答案>>I am my mother’s third child. When I was born, her doctor gently explained to my mother that my left arm was __16__, below the elbow(肘部). Then he gave her some __17__:“Don’t treat her any __18__ from the other girls. Demand more.” And she __19__!
My mother had to work to __20__ our family. There were five girls in our family and we all had to __21__. Once when I was about seven, I came out of the __22__,“Mom, I can’t peel (削……皮) potatoes. I only have one hand. “You get back to peel those potatoes, and don’t ever use that as a(n) __23__ for anything again!” Of course I could peel potatoes with my good hand, while holding them down with my __24__ arm. There was always a __25__ , and Mom knew it, “If you try hard __26__,” she ‘d say, “you can do anything.”
Once in the second grade, our teacher had each of us race across the monkey bars(高低杠). When it was my turn, I __27__ my head. Some kids __28__ . I went home crying. After work the next afternoon, Mom __29__ me back to the school ground. “ Now, __30__ up with your right arm”, she advised. She stood by __31__ I practiced, and she __32__ me when I made progress. I’ll never forget the __33__ time I was crossing the bars. The kids were standing there with their mouths open.
It was the way with everything. When I __34__ I can’t handle things, I see Mom’s smile again. She had the heart to __35__ anything. And she taught me I could, too.
1. A．missing B．broken C．diseased D．short
2. A．warning B．medicine C．help D．advice
3. A．badly B．differently C．well D．normally
4. A．did B．refused C．cried D．was
5. A．care B．help C．support D．feed
6. A．pay attention B．work out C．carry out D．help out
7. A．kitchen B．bedroom C．house D．school
8. A．idea B．change C．excuse D．explanation
9. A．lost B．other C．next D．longer
10. A．chance B．way C．time D．success
11. A．enough B．too C．again D．often
12. A．hurt B．nodded C．shook D．turned
13. A．cheered B．whispered C．joked D．laughed
14. A．drove B．took C．sent D．carried
15. A．pull B．jump C．stand D．rise
16. A．before B．as C．after D．until
17. A．helped B．raised C．praised D．protected
18. A．first B．last C．wonderful D．next
19. A．admit B．fear C．find D．realize
20. A．face B．teach C．learn D．solve
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I am my mother’s third child．When I was born, her doctor gently explained to my mother that my left arm was __1__, below the elbow（肘部）．Then he gave her some __2__:“Don’t treat her any __3__ from the other girls．Demand more．” And she __4__!
My mother had to work to __5__ our family．There were five girls in our family and we all had to __6__．Once when I was about seven, I came out of the __7__,“Mom, I can’t peel （削……皮） potatoes．I only have one hand．“You get back to peel those potatoes, and don’t ever use that as a（n） __8__ for anything again!” Of course I could peel potatoes with my good hand, while holding them down with my __9__ arm．There was always a __10__ , and Mom knew it, “If you try hard __11__,” she ‘d say, “you can do anything．”
Once in the second grade, our teacher had each of us race across the monkey bars（高低杠）．When it was my turn, I __12__ my head．Some kids __13__ ．I went home crying．After work the next afternoon, Mom __14__ me back to the school ground．“ Now, __15__ up with your right arm”, she advised．She stood by __16__ I practiced, and she __17__ me when I made progress．I’ll never forget the __18__ time I was crossing the bars．The kids were standing there with their mouths open．
It was the way with everything．When I __19__ I can’t handle things, I see Mom’s smile again．She had the heart to __20__ anything．And she taught me I could, too．
1．A．missing B．broken C．diseased D．short
2．A．warning B．medicine C．help D．advice
3．A．badly B．differently C．well D．normally
4．A．did B．refused C．cried D．was
5．A．care B．help C．support D．feed
6．A．pay attention B．work out C．carry out D．help out
7．A．kitchen B．bedroom C．house D．school
8．A．idea B．change C．excuse D．explanation
9．A．lost B．other C．next D．longer
10．A．chance B．way C．time D．success
11．A．enough B．too C．again D．often
12．A．hurt B．nodded C．shook D．turned
13．A．cheered B．whispered C．joked D．laughed
14．A．drove B．took C．sent D．carried
15．A．pull B．jump C．stand D．rise
16．A．before B．as C．after D．until
17．A．helped B．raised C．praised D．protected
18．A．first B．last C．wonderful D．next
19．A．admit B．fear C．find D．realize
20．A．face B．teach C．learn D．solve
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