【2017全新版大学英语综合教程4课后答案（Unit4）】在学习《大学英语综合教程》的过程中，课后练习是巩固课堂知识、提升语言能力的重要环节。尤其是第四单元，内容涉及广泛的主题和多样的语言表达方式，对于学生来说既是一次挑战，也是一次提升的机会。
Unit 4 的主题通常围绕着社会现象、文化差异或个人成长等方面展开，文章内容富有启发性，同时词汇量较大，句型结构复杂。因此，掌握本单元的课后答案不仅是对知识点的回顾，更是对阅读理解能力和语言运用能力的检验。
为了帮助同学们更好地理解和掌握本单元的内容，以下是对部分典型题目的解析与参考答案：
一、词汇与语法练习
1. 选择合适的单词填空
例如：The new policy will _______ the local economy.
A. benefit
B. affect
C. influence
D. change
正确答案：A. benefit
解析：benefit 表示“使受益”，符合句意，表示新政策将有利于当地经济。
2. 句子改写
原句：He didn’t go to the party because he was tired.
改写为：He didn’t go to the party due to his tiredness.
解析：due to 是一个常见短语，用于表示原因，与 because of 类似，但更正式。
二、阅读理解题
1. 主旨大意题
阅读材料主要讨论了现代科技对人们生活方式的影响。
正确选项：D. The impact of technology on daily life.
2. 细节理解题
根据文章内容，下列哪一项是作者的观点？
A. 科技的发展只会带来负面影响
B. 人们应该完全避免使用电子设备
C. 科技的使用需要适度控制
D. 所有人都能从科技中受益
正确答案：C. 科技的使用需要适度控制
解析：文章中提到科技虽然带来了便利，但也存在一些问题，如沉迷手机、影响人际关系等，因此作者主张适度使用。
三、翻译练习
1. 英译汉
Original: It is widely believed that education plays a key role in shaping one’s future.
Translation: 人们普遍认为教育在塑造一个人的未来中起着关键作用。
2. 汉译英
Original: 这项研究揭示了环境因素对健康的影响。
Translation: This study reveals the impact of environmental factors on health.
四、写作练习
题目要求：以“Should students be allowed to use mobile phones in class?”为题，写一篇议论文。
范文参考：
Nowadays, mobile phones have become an essential part of our lives. However, whether students should be allowed to use them in class has been a topic of debate. In my opinion, it is not advisable for students to use mobile phones during class time.
Firstly, mobile phones can be a major distraction. Students may get tempted to check messages, play games, or watch videos instead of focusing on their lessons. This can significantly reduce their learning efficiency. Secondly, using mobile phones in class may disrupt the teaching process and disturb other students. Finally, over-reliance on mobile phones may weaken students’ ability to concentrate and think independently.
In conclusion, while mobile phones have many benefits, they should be used with caution, especially in academic settings. Teachers and parents should work together to ensure that students use technology properly and responsibly.
通过认真完成Unit 4的课后练习，并结合合理的复习与总结，同学们可以有效提升英语综合应用能力。希望以上内容能够为大家提供参考与帮助，助力大家在英语学习的道路上不断进步。
