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Most adults remember little about what happened in their early childhood. As a result, some people think that we aren't able to form memories before our fourth or fifth birthdays. But a research into early memories has suggested that this is not true. It says that we do form memories at a very young age. However, what we remember about our early lives seems to change as we grow older.
Researchers in Canada worked with 140 children aged between four and thirteen. First, they asked them to describe their earliest memories. Then they asked them how old they were when the event happened. Next, they asked the kids' parents to make sure that the event actually happened. And all the answers were written down.
Two years later, the researchers went back to the children and asked them again,“What's your earliest memory?”Nearly all the children aged between four and seven in the first interview said something very different in the second interview. And when the researchers reminded them of what they'd said the first time, many of the children said,“No, that never happened to me.”However, many of the children aged between ten and thirteen at the first interview talked about exactly the same memory in the second interview. It seems that our memories change in the early years, but at around the age of ten, the things that we remember get fixed（固定的）.
The researchers have also found out that, more often, children's early memories were happy events instead of stressful ones as many people would expect. The researchers are still working on why.
□ childhood [ˈtʃaɪldhʊd] n. 童年
□ memory [ˈmeməri] n. 记忆力
□ remind [rɪˈmaɪnd] v. 使（某人）想起
□ aged [eɪdʒd] adj. ……岁的
□ fixed [fɪkst] adj. 固定的
□ nearly [ˈnɪəli] adv. 几乎
□ at the age of 在……岁
□ instead of 代替
一、根据短文内容，选择最佳选项。
1.Canadian researchers worked with children__________.
A.aged 4 to 13
B.aged 4 to 10
C.aged 10 to 13
D.aged 4 to 5
2.Most of the children aged__________said completely different things in the two interviews.
A.between four and thirteen
B.between ten and thirteen
C.between four and seven
D.between seven and thirteen
二、根据短文内容，补全句子。
1.Our memories of early lives seem to change with__________.
2.Researchers asked children to__________their earliest memories.
3.__________later, the researchers asked the same children in the second interview.
4.At about__________, the things that we remember get fixed.
5.Mostly, children's early memories are not__________events.
三、根据短文内容，判断下列各句正（T）误（F）。
（ ）1.Most adults remember things that happened in early childhood.
（ ）2.A research says that we can form memories at very young ages.
（ ）3.The research subjects were children under 4 years of age.
（ ）4.Researchers recorded children's earliest memories of what actually happened.
（ ）5.Many of the children aged between four and seven forgot what they said in their first interview.
（ ）6.Researchers don't know why children's early memories are happy.
四、根据短文内容，完成任务。
1.Can children form memories before their fourth or fifth birthdays?
____________________________________________________________
2.What do researchers do in the third step of the first interview?
____________________________________________________________