一、根据中文意思完成句子。
1. 我们应该好好爱护公园里的草地，不要在上面行走。
We should the grassland in the park and not walk on it.
2. 每个人都要尽自己的一份力来回收塑料瓶子。
Everyone needs to to recycle plastic bottles.
3. 我们必须停止在公共场所乱扔垃圾的行为以保持环境干净。
We must in public to keep the environment clean.
4. 请在刷牙时关闭水龙头，尽可能节约用水。
Please save water by turning off the tap when brushing your teeth.
5. 打印之前请三思，也许你并不需要纸质版文件。
before printing, maybe you don't need the paper copy.

1. take good care of
2. do their part
3. stop littering
4. as much as possible
5. Think twice

【分析】
本题为根据中文意思补全英语句子，需结合语境匹配对应的英语固定短语，同时注意句子的语法结构（如情态动词后接动词原形、祈使句用动词原形开头、主语与代词的一致性等）。解题时先明确每个中文短语的核心含义，再联想对应的常用英语表达，最后验证是否符合句子语法要求。
【解析】
1. 中文“好好爱护”对应固定短语take good care of，情态动词should后接动词原形，故填take good care of；
2. 中文“尽自己的一份力”对应固定短语do one's part，主语Everyone对应的物主代词为their，need to后接动词原形，故填do their part；
3. 中文“停止乱扔垃圾”中，“停止做某事”用stop doing sth，“乱扔垃圾”是litter，情态动词must后接动词原形，故填stop littering；
4. 中文“尽可能”对应固定短语as much as possible，修饰动词短语save water，故填as much as possible；
5. 中文“三思”对应固定短语think twice，此处为祈使句，需用动词原形开头，故填Think twice。
【答案】
1. take good care of
2. do their part
3. stop littering
4. as much as possible
5. Think twice
【知识点】
固定短语搭配；祈使句；动词短语用法
【点评】
本题围绕环保主题考察常用英语固定短语，是基础的句子补全题，重点在于学生对日常常用短语的积累，同时需掌握简单的语法结构（如情态动词、祈使句的用法），整体难度适中，适合基础阶段学生练习。
【难度系数】
0.6

二、补全对话。
根据下面的对话情景，在空白处填入一个适当的句子，使对话意思连贯、完整。
A: Hi, Xiao Ya! Everyone is talking about protecting our planet these days.
1.
B: I have stopped using plastic bags. I use a cloth one instead. It's very helpful!
2.
A: That's a good idea! I have started recycling all my plastic bottles. I put them in the recycling bin. 3.
B: Yes, I have. I recycled my old used notebooks and books last week. 4.
A: Of course! I always turn off the lights when I leave a room. It saves energy. Do you save water, too?
B: Sure! I turn off the tap while I'm brushing my teeth. My dad says it makes a difference.
A: It really does! 5.
B: Exactly! If everyone does their part, the environment will get better. Let's keep going!

1. What have you done to protect the environment?
2. What about you?
3. Have you recycled anything?
4. Have you tried saving electricity? / Do you save electricity?
5. Small acts like these really help. / Small things can help a lot.

【分析】
首先通读对话，明确主题为环保行动的交流。第1空需结合B的回答（介绍自己的环保做法），推断A询问B为环保做了什么；第2空是B介绍做法后反问A的情况；第3空结合A提到的回收塑料瓶和B的肯定回答，推断A问B是否回收过东西；第4空结合A提到的省电做法和B的肯定回答，推断A问B是否试过省电；第5空结合下文B的总结，推断A总结小环保行动的作用。需紧扣上下文的问答逻辑和语境提示填写。
【解析】
1. 根据下文B的回答“I have stopped using plastic bags. I use a cloth one instead.”，可知此处A询问B为保护环境做了什么，故填What have you done to protect the environment?
2. 上文B介绍了自己的环保做法，下文A回应自己的做法，此处是B反问A的情况，常用表达为What about you?
3. 根据上文A提到的“I have started recycling all my plastic bottles.”和下文B的回答“Yes, I have. I recycled my old used notebooks and books last week.”，可知此处A询问B是否回收过东西，故填Have you recycled anything?
4. 根据上文A提到的“I always turn off the lights when I leave a room. It saves energy.”和下文A的提问“Do you save water, too?”以及B的肯定回答，可知此处A询问B是否试过省电，故填Have you tried saving electricity? / Do you save electricity?
5. 根据上文两人分享的环保小行动和下文B的总结“If everyone does their part, the environment will get better.”，可知此处A总结小环保行动的作用，故填Small acts like these really help. / Small things can help a lot.
【答案】
1. What have you done to protect the environment?
2. What about you?
3. Have you recycled anything?
4. Have you tried saving electricity? / Do you save electricity?
5. Small acts like these really help. / Small things can help a lot.
【知识点】
日常交际用语（环保主题），补全对话，一般疑问句
【点评】
本题以环保话题为载体，考查学生在具体语境中运用日常交际用语补全对话的能力，需结合上下文的问答逻辑和语境提示作答，贴近生活实际，难度适中。
【难度系数】
0.5