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There are three main reasons why students choose to find someone to brush online courses: First, online courses are usually elective courses, with a slow pace, which does not conform to their own learning progress and plans, and they do not want to waste time brushing courses themselves; Second, they are not interested in learning, or are not interested in some courses, and they are not willing to attend classes at all, just to get corresponding credits; Third, the time is tight and the task is heavy. We should find someone to brush the class, for example, suddenly find someone to brush the class near the end of the term.