完形填空

阅读下面短文，掌握其大意，然后从以下各题所给的四个选项(A、B、C和D)中，选出最佳选项。

　　If you do not use your arms or your legs for some time, they will become weak; and when you start using them again, they will slowly become strong again. 1 knows this, and nobody would think of 2 the fact.

　　Yet there are many people who 3 to know that the memory works in the same way. When someone says that 4 has a good memory, he 5 means that he keeps his memory 6 practice by exercising it very 7 , either consciously or unconsciously. When someone else says that his memory is 8 , he means that he does not give it enough 9 to become strong. The position is exactly the same as that of 10 people, one of 11 exercises his arms and legs by playing balls, while the other 12 in a chair or a car all day. If a friend of yours says that his arms are weak, we know that it is his own 13 . But if he tells us that he has a poor memory, 14 of us think that his parents are to blame, or that he is just 15 , and few of us realize that it is just as it was his arms or legs that were weak. Not all of us can become very strong in body or very clever in mind, 16 all of us can improve our strength and our memory by the same means 17 .

　　Have you ever 18 that people who cannot read or write usually have 19 memories than those who can? Why is this? Of course, because they cannot write down something in a little notebook or something else. They have to remember names, places, songs and stories; so their memory is always being exercised.

　　In a word, if you want to have a good memory, 20 practise remembering.

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Of course，we must work hard.________，we should learn to take good care of ourselves.

A．Therefore 　　　 B．In a word

C．As a result 　　　　 D．Meanwhile

 

The winter of 2008 was extremely bad.________ most of people say it was the worst winter of their lives.

A．In general 　　　　B．In a word

C．In all D．In fact

Any two objects are attracted to each other, ________ , every body must have an attraction for every other body.

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