五、根据短文内容，回答问题。

1. When do dreams usually occur during sleep?
_______
2. What theories about why we dream are mentioned in the passage? (List two examples.)
_______
_______
3. What can a dream about falling symbolize?
_______

1. During the Rapid Eye Movement (REM) sleep stage. 2. Some scientists believe that dreaming helps us process our emotions and experiences from the day. Others think that dreams help us solve problems. 3. It can symbolize feeling out of control in our life.

【分析】
本题为英语阅读细节问答题，所有答案都可直接从原文获取，无需复杂推理。解题思路如下：1. 第一题提取题干关键词"When"、"dreams occur during sleep"，回到第一段定位描述梦发生时段的语句；2. 第二题提取关键词"theories about why we dream"，定位到第二段列举的做梦相关理论，任选两条原文给出的理论作答即可；3. 第三题提取关键词"dream about falling"、"symbolize"，回到最后一段定位梦到坠落的象征含义的对应语句，提取内容即可完成作答。
【解析】
1. 定位原文第一段内容"It usually happens during the Rapid Eye Movement(REM) sleep stage."，直接提取对应信息作答。
2. 定位原文第二段，文中一共列举了3种关于人为什么做梦的理论，任选其中2条写出即可，示例选取前两条理论作答。
3. 定位原文最后一段内容"Dreaming about falling can symbolize(象征) feeling out of control in our life"，提取对应信息作答。
【答案】
1. During the Rapid Eye Movement (REM) sleep stage.
2. Some scientists believe that dreaming helps us process our emotions and experiences from the day. Others think that dreams help us solve problems.
3. It can symbolize feeling out of control in our life.
【知识点】
阅读理解细节查找，原文信息提取
【点评】
本题属于基础难度的阅读题，所有设问的答案都能在原文中直接找到对应原句，没有设置推理类障碍，主要考查学生快速扫描文本、定位关键信息的能力，作答时注意单词书写准确，和原文表述保持一致即可顺利得分。
【难度系数】
0.9