_______ I felt very tired,I tried to finish the work A.Although B.Because C.As D.As if

题目

_______ I felt very tired,I tried to finish the work A.Although B.Because C.As D.As if
答案写的是D,为什么不是A?

答案

D错了,正确答案应为A:Although引导让步状语从句.
而As if(好像)引导方式状从,用在此句不合适.
句意:虽然我感到很累,但我还是尽力完成工作.