問題詳情：
閲讀下面短文，在空白處寫出各單詞的正確形式，單詞的第一個字母已給出。
Most adults find it hard to remember the things happened while they were children. Now scientists have found exactly when these memories d___51___.
A new study has found that most three-year-old children can remember a lot of what happened to them a year e___52___,and these memories are still clear while they are 5 and 6, but by the time they are over 7, these memories become weaker r___53___.
Most children by the age of 8 or 9 can only remember 35% of their e___54___ from under the age of 3 according to the new studies.
The scientists say this is because at around this age the way we form(形成)memories begins to change. They say that before the age of 7 children do not have a s___55___of time and place in their memories. In older children, however, the early things they can remember become more adult-like in the way they are formed. Children also have a far faster speed of f ___56___ than adults. The discoveries also help to explain why children can often have clear memories of what they have done, b___57___ then forget them just several years later.
The children were organized to the laboratory for the first time at the age of 3 and discussed 6 impressed(印象深刻的)things from their past, such as the first relaxing trip with your family, the first d___58___ accident you met, and the first day of school. The children then returned for a second s___59___between the ages of 5 and 9 to discuss the same things. The scientists found that between the ages of 5 and 7,the amount（量）of memories that the children could remember r ___60___ between 63%-72%. However, between the ages of 8 to 9, the amount of memories that the children could remember fell to between 35%--36%.
【回答】
51. disappeared
52. earlier
53. rapidly
54. experience
55. sense
56. forgetting
57. but
58. dancing
59. session
60. remained
【解析】本文是説明文。對許多成年人來説，很難回憶起兒時的一些經歷。一項研究表明，我們的記憶力的變化與年齡有關。
51.考查動詞。根據上文Most adults find it hard to remember the things happened while they were children. 大多數成年人發現很難記住他們小時候發生的事情。結合Now scientists have found exactly when these memories d___51___. 可知是現在科學家們已經找到了這些記憶消失的確切時間。“消失”disappear，由語境可知這裏時態用一般過去時，故*填disappeared。
52.考查形容詞。根據上文most three-year-old children can remember a lot of大多數三歲的孩子都能記住很多事情，結合首字母提示以及what happened to them a year e___52___,可知此處指的是一年前發生在他們身上的事，a year earlier“一年前”，故*填earlier。
53.考查副詞。根據上文these memories are still clear while they are 5 and 6,這些記憶在他們5歲和6歲的時候仍然清晰，由轉折詞but，再結合首字母提示，可知此處句意為：但當他們超過7歲時，這些記憶會迅速減弱。“迅速地”rapidly，副詞，修飾前面的動詞，故*填rapidly。
54.考查名詞。根據Most children by the age of 8 or 9 can only remember 35% of their e___54___
from under the age of 3 according to the new studies. 結合語境及首字母提示：根據新的研究，大多數8歲或9歲的孩子僅僅能記住他們3歲以下35%的……。可知此處表達的是“經歷、經驗”，英文表達是experience，在這裏用作不可數名詞，故*填experience。
55.考查名詞。根據They say that before the age of 7 children do not have a s___55___of time and place in their memories. 結合語境及首字母提示：他們説，7歲以前的孩子在記憶中沒有時間和地點的……。可知此處表達的是“概念、觀念”sense，前面有不定冠詞a，所以用其單數形式，故*填sense。
56.考查動詞。根據下文then forget them just several years later.幾年後他們就會忘記，結合Children also have a far faster speed of f___56___ than adults.可知孩子 遺忘速度也比成年人快得多。“忘記”
forget，動詞，of是介詞後接動詞的ing形式，故*填forgetting。
57.考查連詞。根據上文children can often have clear memories of what they have done,以及then forget
them just several years later. 可知前後句之間是轉折關係，結合首字母提示可知應用連詞but，句意為：孩子們常常對他們所做的事情有清晰的記憶，但幾年後就會忘記。故*填but。
58.（本題*不唯一，只要符合語境和題意即可。）考查動名詞。根據上文 the first relaxing trip with
your family, 以及下文and the first day of school.結合the first d___58___ accident you met, 可推知此處句意是第一次遇見……的意外，由首字母提示可知，*可以填“跳舞”dancing。（本題*不唯一，只要符合語境和題意即可。）
59.考查動詞。根據前面的關鍵詞return“返回”，以及後面的to discuss the same things“去討論同樣的事情”，可知這裏表達的是“開會、聚集”，second session“再次聚集、開會”，句意為：然後，孩子們在5歲到9歲之間再次返回來討論同樣的問題。故*填session。
60.考查動詞。根據The scientists found that between the ages of 5 and 7,the amount（量）of memories that the children could remember r ___60___ between 63%-72%.結合語境：科學家發現，5歲和7歲之間年齡段的孩子，能記住的記憶量……在63%-72%之間。可知此處表達的是“保持”remain，由主句中的found可知句子時態用一般過去時，所以這裏應用remain的過去式remained，故*填remained。
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