批改网上写作文，说是连词缺失，怎么改，谢谢

Question

So maybe I will run into some obstacles and (challenges), for instance, English is not very well, I can't understand the subject's knowledg.

Answer 1

应该是关联词语缺失，补充上恰当的关联词语就行，看看句子之间是否是因果，转折，递进等关系。