While he was climbing the high mountain, he had his leg ____.

While he was climbing the high mountain, he had his leg ____.
A、broke
B、break
C、broken
D、breaking
【正确答案】：C
【题目解析】：本题测试的是宾语与宾语补足语之间的关系：此句中的had为使役动词，其后的宾语与宾语补足语之间的关系是逻辑上的动宾关系，根据英语语法，此处应用过去分词。本句的意思是：“他在攀爬那座高山时，摔断了腿。“