题目内容

All of us must do_______ to help protect the environment，or we will have more hazy weather雾霾天气.                                    
A．something usefulB．anything usefulC．useful somethingD．useful nothing
A

试题分析：something一些东西，一般用于肯定句及表示请求建议等含义的疑问句中；anything也是表示一些东西，任何东西，一般用于否定及疑问句中。Nothing没有东西，用于肯定句表示否定含义；修饰不定代词的形容词一般放在被修饰词的后面。句意：我们所有人都应该做些什么有用的事情来保护环境，否则我们就会有更多的雾霾天气。结合语境可知选A。
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