— I saw Betty go to Grandpa Zhang's home just now.

— Yes, she is often seen            the old man with his housework. [ ]

A. help

B. to help

C. helps

D. helped

按照属性划分，品牌分为（）。

A.制造商

B.产品品牌

C.企业品牌

D.组织品牌

E.中间商品牌