题干
为了加强环保意识，让中学生认识到保护环境的重要性，你将代表英语俱乐部向全校学生发出“保持城市清洁”的倡议。请根据以下要点提示，写一份100词左右的倡议书。
要点提示：1.保护城市环境是我们的职责；2.给出保护城市环境的建议（至少三条）；3.发出号召。
要求：1.格式已给出，不计入总词数；2.内容必须包含所有要点提示，可适当发挥。
Dear friends,
……
Thank you!
English Club
答案(点此获取答案解析）
One possible version:
Dear friends,
The environment of our city is becoming worse and worse. It's our duty to keep it clean. Firstly, walk or ride to school instead of driving a car. This can help reduce pollution greatly. Secon
Dear friends,
The environment of our city is becoming worse and worse. It's our duty to keep it clean. Firstly, walk or ride to school instead of driving a car. This can help reduce pollution greatly. Secon
且 
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，则
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