of them the south of China . They live on rice .
A. Most ; most
B. Most; mostly
C. Mostly ; most
D. Mostly ;almost
网友回答
A. Most ; most
(答案→)B. Most; mostly
C. Mostly ; most
D. Mostly ;almost
解析：考查词义辨析。most“大多数（的）”；mostly是副词，意为“主要地”。句意“他们大多来自中国南部，他们主要以大米为食。”故选B。