will do good to a senior student to do a part-time job when she wants to know more about societyA.AsB.It C.ThatD.He
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B解析试题分析:考查it做形式主语,句意:当高中生想了解社会的时候,做兼职工作对他是有好处的,it指代to do a part-time job,选B。考点:考查it做形式主语
点评:为了避免句子主语太长,显得头重脚轻,英语中往往用it做形式主语,代替不定式,动名词或从句,这也是英语的一大特点。