第四册：流利英语 · 单元 3 复习与自测

单元导读 · 单元语法总结 · 单元单词与短语 · 单元复习与自测

先独立作答，再展开答案。下列原创题从相应课时选取，覆盖本范围每一课；错题请回到课时讲解解释错误原因，再替换一个条件重做。

Lesson 17 · cause、lead to 与 be associated with

阅读材料（本站原创）： In the fictional survey, a wetter spring was associated with fewer rabbits near the field.

练习 1

示例是否已经证明更潮湿的春季导致兔子减少？

参考答案与解析

答案： 没有。

解析： be associated with 表关联，还需要排除其他解释。

表达迁移： 为虚构兔子数量调查写三句摘要：一项关联、另一种解释、后续观察需要。

表达参考与点评

A wetter spring was associated with fewer rabbits near the field. Changes in food supply may also explain the difference. A better survey would compare several sites over more than one season.

用关联、替代解释和跨地点观察构成谨慎摘要，不据历史疾病故事提供干预步骤。

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Lesson 18 · 感官动词的主动与被动转换

阅读材料（本站原创）： The animal was seen to surface beside the boat twice.

练习 1

把 We saw the animal turn. 改成被动句。

参考答案与解析

答案： The animal was seen to turn.

解析： 被动结构中的不定式恢复 to。

表达迁移： 写三句海边观察笔记：一次所见、一个未知问题、一次进一步观察计划。

表达参考与点评

A small animal was seen to surface near the harbour. We could not identify its species from that distance. Next time, we will record its shape and movement more carefully.

描述行为而不编造意图，并把物种识别的不确定性写出来。

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Lesson 19 · 同位语从句与定语从句

阅读材料（本站原创）： The belief that every dream has one fixed meaning is difficult to justify.

练习 1

示例中的 that 从句说明 belief 的内容还是修饰提出它的人？

参考答案与解析

答案： 说明 belief 的内容。

解析： 从句本身结构完整。

表达迁移： 写三句评价一个梦的解释：陈述回忆、提出可能联系、保留其他解释。

表达参考与点评

I remembered a dream about a crowded station. It may have reflected my worries about an upcoming trip. That interpretation is possible, but it is not the only one.

回忆与解释分句处理，may 和 not the only one 避免把主观推测当成唯一答案。

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Lesson 20 · 过去分词作后置定语

阅读材料（本站原创）： The samples collected on Tuesday were analysed separately.

练习 1

展开 samples collected on Tuesday 中的分词定语。

参考答案与解析

答案： samples that were collected on Tuesday

解析： 过去分词定语对应被动关系从句。

表达迁移： 用三句写实验样本管理说明，包含采集、分组和结论范围。

表达参考与点评

The samples collected at different sites were kept separate. Each group was given a clear label. Results from one group cannot automatically be applied to another.

用分词定语说明来源，用末句避免跨组过度概括；不涉及危险操作或医疗处置。

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Lesson 21 · It is/was…that 强调句

阅读材料（本站原创）： It was the actor’s silence that made the final scene so tense.

练习 1

还原示例为普通陈述句。

参考答案与解析

答案： The actor’s silence made the final scene so tense.

解析： 去掉强调框架后主干完整。

表达迁移： 用三句评论一段自选无声电影片段，说明哪种表演手段影响了你。

表达参考与点评

It was the long pause that caught my attention. The actor looked towards the empty doorway without moving. This small gesture created more tension than a dramatic speech would have done.

强调句提出观察焦点，具体动作提供依据，比较句说明效果。

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Lesson 22 · what 从句作主语与表语

阅读材料（本站原创）： What matters is whether the new tool solves a real problem.

练习 1

示例中主句的系动词是什么？

参考答案与解析

答案： is

解析： 前后两个从句由 is 连接。

表达迁移： 用三句评价一款虚构学习工具，给出一个进步标准和一个验证方法。

表达参考与点评

What matters is whether students understand more. Faster completion alone does not prove deeper learning. We could compare how well students explain a new problem after using the tool.

先定标准，再排除替代指标，最后提出能对应标准的验证方式。

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Lesson 23 · 现在分词状语与逻辑主语

阅读材料（本站原创）： Gliding above the field, the bird turned towards the hills.

练习 1

示例中谁在 gliding？

参考答案与解析

答案： the bird

解析： 分词状语与主句共享主语。

表达迁移： 用三句记录一次鸟类观察，含分词状语、动作变化和观察限制。

表达参考与点评

Circling above the trees, a large bird gradually gained height. It then moved across the valley without flapping. From the ground, I could not identify the species with confidence.

动作描述具体，最后将物种判断与观察事实分开。

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Lesson 24 · 否定或限制副词前置倒装

阅读材料（本站原创）： Rarely do two viewers notice exactly the same details in a painting.

练习 1

填空：Rarely ___ she choose bright colours.

参考答案与解析

答案： does

解析： 主语 she，现时一般时倒装用 does。

表达迁移： 选择一件普通物品写三句审美评论，包含一个具体特征和一个观点限制。

表达参考与点评

Rarely do I notice the shape of an ordinary cup. This one has a narrow base and a softly curved handle. I find the proportions pleasing, although another viewer may prefer a simpler form.

倒装引入反思，具体特征支撑个人评价，让步句保留不同审美。

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