Though it's a challenging job, he did it it took me．
A. one-third a time
B. one – third time
C. the one - third time
D. one - third the time
网友回答
A. one-third a time
B. one – third time
C. the one - third time
(答案→)D. one - third the time
解析：考查倍数：倍数+the+名词，one-third就是倍数，the time是名词，it took me是定语从句，修饰time，句意;虽然这是有挑战的工作，但他用了我花的三分之一的钱。选D。