—Who your English teacher?—Mary .A. does;doesB. is;isC. does;isD. is;does

问题补充：

—Who your English teacher?

—Mary .

A. does;does

B. is;is

C. does;is

D. is;does

答案：

A. does;does

(答案→)B. is;is

C. does;is

D. is;does

解析：考查主谓一致。句意：谁是你们的英语老师？——玛丽是。结合语境可知本题为系表结构，does不能用作系动词。结合句子主语和表语，可知系动词用单数形式，故选B。