If you do not use your arms or your legs for some time, they become weak. When you 1 using them again, they 2 become strong again. Everybody knows this and nobody would think of 3 this fact. 4 there are many people who do not 5 to know that memory works in the 6 way. ____ 7 someone says that he has a good memory; he 8 means that he 9 his memory by practising exercising it. When someone 10 says that his memory is poor, he actually means that he 11 give it enough chances to become 12 .Have you ever 13 that people who cannot read or write usually have 14 memories than those who can? This is 15 those who 16 read or write 17 remember things. They have to remember dates, places, names, songs and stories. So their memory is the whole time 18 .So 19 you want to have a good memory, you should learn from those people, 20 by remembering what you see, hear, feel and write. If so, you must have a good memory. 1. A. begin       B. go on     C. stop        D. continue 2. A. quickly     B. slowly     C. soon       D. at once 3. A. doing      B. agreeing    C. questioning  D. answering 4. A. Yet        B. Still       C. So         D. Certainly 5. A. want       B. seem      C. get         D. hope 6. A. other       B. usual      C. same        D. opposite 7. A. As         B. What      C. While       D. When 8. A. real        B. actually    C. true        D. then 9. A. wants      B. builds up    C. makes      D. keeps 10.A.again      B. else         C. more       D. once 11.A.do not     B. is not        C. never       D. does not 12.A.poor       B. weak        C. strong      D. healthy 13.A.seen       B. heard of      C. noticed     D. thought of 14.A.worse      B. better       C. more        D. less 15.A.why        B. how       C. because      D. the reason 16.A.used to     B. cannot      C. try to        D. have to 17.A.will not     B. have to      C. refuse      D. cannot 18.A.ready       B. being used   C. busy       D. training 19.A.if          B. that        C. though      D. thus 20.A.please      B. try          C. train       D. enjoy