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　If you don't use your arms or your legs for some time, they will become weak; when you start using
them again, they will gradually (逐漸地) become stronger again. Everybody knows this. Yet many people
do not seem to know that it is the s  1   with memory. When someone says that he has a good memory,
he really means that he d  2   give it enough chance to become stronger. 　　
    If a friend says that his arms and legs are weak, we k  3   that it is his own fault. But if he tells us that
he has a poor memory, many of us think that his p  4   are to blame, and f  5   of us know that it is just
his own fault. 　　
    Have you e  6   found some people can't read or write but they usually have b   7   memories? This is
b  8   they cannot read or write and they h   9    to remember things; they cannot write them down in
a little notebook. They must remember dates, names, songs and stories; so their memory is the whole time
being exercised. 　　
    So if you want a good memory, l  10   from these people: practise remembering.

1．________　2．________　3．________　4．________　5．________ 　　
6．________　7．________　8．________　9．________　10．________