—How are you getting on with your work? —Oh I’m sorry. Things aren’t going so well as .A.

问题补充：

—How are you getting on with your work? —Oh, I’m sorry. Things aren’t going so well as .

A. plans

B. planning

C. planned

D. to plan

答案：

A. plans

B. planning

(答案→)C. planned

D. to plan

解析：考查省略结构。句中补全为Things aren’t going so well as （it was) planned，故选C。