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althoughhetiredhisbest,hefailedtoworkouttheproblem.Alth……he______to……

although he tired his best,he failed to work out the problem. Alth……he ___ ___ to ……
分类:英语 2017-10-21 共 2 个回复
最佳回复
failed=was unsucessful
其它回复
was unable


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