保护环境的建议表达 — 英语词汇题
题目
根据句意和首字母提示补全单词，完成保护环境的建议。1. We should not throw r___ into the river. 2. Please turn off the lights to save e___. 3. We can p___ trees to make our city green. 4. Don't waste paper; use both s___ of each page. 5. Taking the bus helps reduce air p___.