train用法

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/11/06 19:28:56

to carry out first aid before, the young girl saved the child who had fallnen into the river. A Trained B Having trained到底选哪个

解题思路：如下
解题过程：
选A。句子的逻辑主语 the young girl 与动词train之间是被动意义，故用过去分词做状语，表示完成于被动意义。
而选项B是主动形式，不符合题意。
句意是：小女孩以前被培训过进行急救，所以她救了落水儿童。
最终答案：略

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