在四川大学网络教育学院的学习过程中，《大学英语(二)》作为一门重要的基础课程，对于提升学生的英语综合能力具有重要意义。本次第二次作业旨在帮助学生巩固所学知识，并通过实际应用加深对知识点的理解。以下为本次作业的答案解析，供同学们参考。

第一部分：词汇与语法

1. 选择题

例题：The teacher asked us _______ the classroom after school.

A. cleaning B. to clean C. cleaned D. clean

正确答案：B. to clean

解析：此题考察的是“ask sb. to do sth.”这一固定搭配，意为“要求某人做某事”。

2. 完形填空

例题：It was raining heavily, so they decided _______ at home.

A. stay B. staying C. to stay D. stayed

正确答案：C. to stay

解析：根据语境和固定搭配，此处应使用“decide to do sth.”结构，表示“决定做某事”。

第二部分：阅读理解

1. 阅读短文并回答问题

短文：Once upon a time, there lived an old man in a small village. He had a magic pot that could make anything he put inside it double. One day, he put some rice into the pot and closed the lid. When he opened it again, there were two pots full of rice. The old man became very rich because of this pot.

问题：What did the old man put into the pot?

答案：The old man put some rice into the pot.

解析：通过仔细阅读短文可以找到答案，这道题目主要测试学生对细节信息的捕捉能力。

第三部分：写作

题目：请写一篇关于环境保护的小短文，字数不少于50词。

范文：Our environment is becoming worse and worse. We should take action to protect it. For example, we can plant more trees, reduce waste, and recycle materials. By doing these things, we can make our world a better place for future generations.

以上即为四川大学网络教育学院《大学英语(二)》第二次作业的答案解析。希望各位同学能够通过这次作业进一步提高自己的英语水平，并在今后的学习中不断进步。