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.
2. If you don't use your arms or legs for some time, they will become strong.
1. The main reason for one's poor memory is that his parents have poor memories.
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。