I often help my mother _____________ housework. [ ]
A. does
B. did
C. do
答案：C
consensus sequence
建筑节能标准应作为( )继续教育的必修课程。
A．注册结构师
B．注册建造师
C．注册建筑师
D．咨询工程师
E．注册城市规划师
