题目内容
1．Is _______ necessary_______ the workers wear uniforms at work？（ ）| A． | it，for | B． | this，to | C． | it，that |
分析 工人穿工作服上班是有必要的吗？
解答 答案：C
分析句子结构，初中阶段常考的句式有：It is+adj．for sb．to do sth．和 It is adj．that+从句．通常it 作形式主语，所以排除选项B；另外如果选用第一种句式，就要用不定式to wear，而题目中使用的是动词原形，所以考查的是It is adj．that+从句这用句式，wear 是从句的谓语，符合句子结构和语境，所以选C．本题考查的属于第二种情况，
点评 考查it 作形的式主语的特殊句式，考生要学会划分句子结构和积累特殊句式．
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