He is a teacher he is Chinese.A. andB. butC. orD. so

问题补充：

He is a teacher he is Chinese.

A. and

B. but

C. or

D. so

答案：

(答案→)A. and

B. but

C. or

D. so

解析：四个选项分别表示并列关系、转折关系、选择关系和因果关系。从上下文来看，是老师和是中国人是并列关系，因此选A。