He can’t help __ housework, for he is busy __ for the examination.

I can’t help _____repairs because I’ve something important ________ .

A. making; to do　 B. to make; done　 C. making; doing D. make; to do

He can’t help __ housework, for he is busy __ for the examination.

1. A.
   doing; preparing
2. B.
   to do; to prepare
3. C.
   doing; to prepare
4. D.
   to do; preparing

I can't help ________ housework at home because I am busy ________ the entrance examination．

1. A.
   to do；prepare for
2. B.
   do；preparing for
3. C.
   to do；to prepare for
4. D.
   doing；preparing for