When MIT put their course content online in 2002, they were expecting their site

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问题 When MIT put their course content online in 2002, they were expecting their site to be one of the most popular sites around the world. [br] With the gradual development of open courseware, there is a variety for both its ______.

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答案 forms and content

解析 由题干中the gradual development of open courseware可定位到第三个小标题下第一段首句As open courseware  matures, its forms begin to vary as widely as its content.[精析] 此处要求填入名词性短语与介词for搭配。题干中the gradual development of open courseware, variety分别与原句As open courseware matures,vary相对应。因此原句中forms和content符合题干要求,将两词按题干语法要求连接为forms and content即得答案。
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