说明
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I've had some very disturbing experiences. (Wells) 我遇到过一些令人烦恼的事。
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To compensate for his unpleasant experiences in hospital, the man drank a little more than was good for him. (NCE 3, L. 29) 为了补偿他在住院期间不愉快的经历，他多喝了点酒。
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Jumping out of ____ airplane at ten thousand feet is quite ____ exciting experience. A. 不填；the B. 为填；an C. an；an D. the；the（全国高考，02-26） (参见 abstract nouns)
请做下面的英语试题：
They want to expose those educational disadvantaged students to creative, enriching educational experiences for a five-year period. (全国研考,93-62)