With an appropriate conjunctive:Though it was late in the night, 1he continued to work vigorously.
  • 1、
【正确答案】 1、正确答案：yet    
【答案解析】解析：在带有让步状语的主从复合句中，though和but不能同时出现，但如果从句中用了though，主句中可用yet。答案为yet。