1、In the end , the ___ prisoner was caught in the desert.

A escape B escaping C escaped D escapes

答案是：C 请问此处为什么用被动形式，犯人完全是自己主动逃跑的呀

2、______ form the medical college, his parents sent him abroad for further study.

A Graduating B Graduated C Having guaduated D When he graduated

答案是：D 请问为什么不选C

1,这里用过去分词是说动作已经发生完毕，与主动被动没有关系。也就是说“那个已经逃跑了的罪犯”又被抓了回来。
2，主句的主语是his parents，不是his parents大学毕业以后，而是他毕业以后，主句主语与分词的主语不一致，是不行得，所以只能用从句或独立主格结构。因此，前面的三个答案都是错误的。