3. 第二段开头已说明。　4. 第四段开头已说明。

1. 文中没有此说法。　2. 从第一段可判断。

5. The best title of this passage is “How to Have a Good Memory”.

参考答案：　1. F　2. F　3. T　4. F　5. T

　讲解：

4. Some people can't read or write, but they have better memories, because they have saved trouble.

　　 T 　　 F

3. A good memory comes from more practice.

　　 T 　　 F

2. If you don't use your arms or legs for some time, they will become strong.

　　 T 　　 F

1. The main reason for one's poor memory is that his parents have poor memories.

　　 T 　　 F

4. 由短文最后一段倒数第2句“They came down in Poland...”可知答案为D。

3. 从第3段可以看出，越往上温度越低，因此应选A。