D. to have enabled
【解析】选A。句意:那个退休的人把他大部分的积蓄捐献给了玉树地震中受损的学校,使得学生们能够重返教室。本题考查动词的-ing形式作结果状语(自然而然的结果); B和D项均为完成式,表示enable这个动作先发生,这与语境矛盾,故排除;C项是不定式作结果状语,多用于表示出乎意料的结果。所以选择A项。
【知识拓展】-ing形式与不定式作结果状语的区别
ing形式作结果状语表示一定逻辑的结果,即意料之中的结果,其作用相当于一个非限制性的定语从句;而不定式作结果状语通常表示非逻辑的结果,即出乎意料的结果,不定式多与only连用。
A small plane crashed into a hillside five miles east of the city, killing all four people on board. =…, which killed all four people on board.
②Oil prices have risen by 32 percent since the start of the year, reaching a record US$ 57.65 a barrel on April 4. =…, which reached a record …
③The news reporters hurried to the airport, only to be told the film stars had left.
④A lot of new machines were applied in the factory, thus resulting in a production increase. =…, which thus resulted in a production increase.
⑤He hurriedly had his breakfast and took a taxi to the station, only to find the train had left half an hour before.
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