79._____to only a few people here,his reputation abroad is very great.(know).
虽然这里只有几个人知道他，但他在国外的名气却很大。
Although/Though he is known
根据以上解题思路可知，此处应该用although/though引导的让步状语从句，所以答案为：Although/Though he is known。
根据句意，此处应该用让步状语从句，首先提出引导让步状语从句的连接词Although/Though，再结合sb./sth. be known to sb.固定搭配，可知答案为：Although/Though he is known。
很容易忽视这里该用被动语态。