—Do you know the girl is talking to our English teacher?—Yes. She’s my sister.A. whoB. who

问题补充：

—Do you know the girl is talking to our English teacher?

—Yes. She’s my sister.

A. who

B. whom

C. which

D. Whose

答案：

(答案→)A. who

B. whom

C. which

D. Whose

解析：四个选项分别表示谁主格，谁宾格、哪一个和谁的，根据前置词the girl，且为从句主语，故选A。你认识那个正在和英语老师说话的女孩吗？