问题补充：
You know that widely reading helps your knowledge so I can’t help the housework every day.
A. an large, doing
B. to rich, to do
C. add, to
D. add to, doing
答案：
A. an large, doing
(答案→)B. to rich, to do
C. add, to
D. add to, doing
解析：can’t help doing sth. 表示忍不住，禁不住；can’t help to do sth.表示不能帮助
