中国大学MOOC: 学完Lecture 1的教学视频后，根据内容补全空缺处单词。Mike went camping with some friends he met onlineby Southern Lake on .
中国大学MOOC: 学完Lecture 1的教学视频后，根据内容补全空缺处单词。Mike went camping with some friends he met onlineby Southern Lake on .
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