He promise to write.I heard nothing,( ).

题目

He promise to write.I heard nothing,( ).
A although B but Cthough D while

答案

C
这里需要一个副词,而其余三个只能用作连词.though可做副词或连词,意为尽管,表转折.
整句意思是,他保证写,但我却什么也没听到.