1.The retired man donated most of his savings to the school

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1.The retired man donated most of his savings to the school damaged by the earthquake in Yushu ,________the students to return to their classrooms.
A.enabling B.having enabled C.to enable D.to have enabled
选A.
2.Schools across China are expected to hire 50,000 college graduates this year as short-term teachers,almost three times the number hired last year,____ reduce unemployment pressures.
A.help B.to have helped C.to help D.having helped
选C.
两题都是高考题,为什么第一题不能用to enable?讲解说逗号后面不用不定式,可第二题是江苏09的高考题啊.who can tell me why?

第二题中的两个逗号中间部分是补充解释的,可以省去不看,后面部分和前面是不定式的关系

1.The retired man donated most of his savings to the school The retired man donated most of his savings to the school da #[4] The retired man donated most of his savings to the scho The retired man donated (捐赠) most of his savings to the scho ,to这样可以吗(标点后接to）The retired man donated most of his savings The inventor has donated most of his money to the poor.the p the news that Bill donated all his savings to charity was gr he has donated most of his money to（ the poor）.(对划线部分提问） To（ 11.Most of his savings ______ in the Xin Hua Bank. of all the money donated,most is spent in...donated是非谓语吧?如果是 the old man gave most of his money to ____(medicine) researc 翻译：Sam was taking his savings to the post office.