问题
选择题
Do you often help your mother______?
A．with clean the house
B．cleaning the house
C．to cleaning the house
D．clean the house
答案
答案：D
题目分析：句意：你经常帮妈妈打扫房子吗？固定短语help sb to do sth./do sth.或者help sb. with sth. 故选D.