With an online course Lynn has over 300, 000 students all over China her class through th

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(答案→)A. attending
B. attended
C. attend
D. are attending
解析：考查现在分词做定语：分析句子可知这句话的谓语是has，这里填的是定语，因为students和attend是主动关系，用现在分词做定语，句意：有一个网上课程，Lynn在中国有超过300000名学生通过网络上她的课。选A。