题目

阅读下面的短文，根据短文内容及首字母提示，在短文空白处填入一个恰当的词，使短文内容完整，通顺。     Most adults find it hard to remember the things happened while they were children. Now scientists have found exactly when these memories d.     A new study has found that most three-year-old children can remember a lot of what happened to them a year e, 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.     Most children by the age of 8 or 9 can only remember 35% of their e 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 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 than adults. The discoveries also help to explain why children can often have clear memories of what they have done, b 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 accident you met, and the first day of school. The children then returned for a second s 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 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%. 答案：【1】disappeared【2】earlier【3】rapidly【4】experience【5】sense【6】forgetting【7】but【8】dangerous【9】session【10】remained

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