第18题: [单项选择]It is ______ he often breaks the school rules ______ makes his headteacher unsatisfied with him. A. what; that B. that; what C. that; that D. which; that 参考答案:C 答案解析:[考点] 主语从句和强调句同时应用 [解析] 此句为强调句型,被强调部分是句子的主语,由第一个that即从属连词引导的主语从句来充当;第二个that是强调句型的组成部分。