虽然我浑身酸痛，可是不干活儿不行呀！（）

虽然我浑身酸痛，可是不干活儿不行呀！（）
A、Though I still ached all over， I must work.
B、Though I still ached all over， I?had to work.
C、Though I still ached all over， I cannot but work.
D、Though I still ached all over， but I had to work.
正确答案：B