在下面短文的空白处填上一个适当的词(该词首字母已给出)，将完整答案写在下边相应题号横线上。

　　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(逐渐地)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．

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