——Do you know what your problem is?—Yes. I always overwork to for lost time.A. sit upB. k

问题补充：

——Do you know what your problem is?

—Yes. I always overwork to for lost time.

A. sit up

B. keep up

C. make up

D. hold up

答案：

A. sit up

B. keep up

(答案→)C. make up

D. hold up

解析：C 考察介词短语辨析。句义：你知道你的问题所在吗？知道。我总是过度工作来弥补失去的时间。Make up弥补。根据句义说明C正确。