I am busy preparing for the mid-term examination so I can’t help housework.A. doingB. to

问题补充：

I am busy preparing for the mid-term examination, so I can’t help housework.

A. doing

B. to do

C. being done

D. with doing

答案：

A. doing

(答案→)B. to do

C. being done

D. with doing

解析：考查短语辨析。can’t help doing 情不自禁做某事，can’t help to do 不能帮助做某事，句意：我在忙着为期中考试准备，因此群殴不能帮助做家务。所以选B。