-----Were you busy last weekend ?
------Very. Rather than time playing cards as usual.I devoted every effort to an advertisement .
A. waste ; make
B. wasting ; making
C. to waste ; make
D. a waste of ; making
网友回答
A. waste ; make
(答案→)B. wasting ; making
C. to waste ; make
D. a waste of ; making
解析：rather than +doing = instead of，第二空前to是介词，所以用making。