剑三宠物忧虑:如果人人都为保护环境做出贡献___ ___ ___ ___ ___ to protecting the environment .
来源:百度文库 编辑:神马品牌网 时间:2024/04/27 23:20:03
If everyone makes a contribution
If everyone does his/her part to protect the enviroment
If everyone makes contribution(不可数名词)
If everyone spends his effort
If everyone make a contribution
If everyone makes a contribution