If I had worked harder at school, I in a fortable office now.
A. would have sat
B. had sat
C. would be sitting
D. could sit
网友回答
A. would have sat
B. had sat
(答案→)C. would be sitting
D. could sit
解析：考查虚拟语气。句意：如果在校学习更努力一点，我现在应该坐在舒服的办公室里面了。结合语境可知是对将来的虚拟，结合时间词now可知虚拟的是将来某种正在发生的动作，故选C。