- 试题详情及答案解析
- At the root of volunteering is the idea ________ one person may have the ability to offer services that can help other people.
- 答案：A
- 试题分析：考查同位语从句。idea后面的句子“one person may have the ability to offer services”不缺少成分，说明不是定语从句，what引导名词性从句作主语或宾语，which作定语，排除B、C；that引导同位语从句，对前面的名词进行补充说明，that不作句子成分但不能省略，排除D；类似的词有fact, word, news, question, suggestion, order等，故选A。
考点：考查同位语从句