takes my mother two hours housework every day.A. That;doB. That;to doC. It;to doD. It;do

问题补充：

takes my mother two hours housework every day.

A. That;do

B. That;to do

C. It;to do

D. It;doing

答案：

A. That;do

B. That;to do

(答案→)C. It;to do

D. It;doing

解析：句式，it takes sb ... to do sth句型，仅指花费时间（three hours等），必须用it作形式主语指代不定式内容，故选C。