– Do you know the girl is drawing the pictures under the tree?—Yes . She is my new classma

问题补充：

– Do you know the girl is drawing the pictures under the tree?

—Yes . She is my new classmate.

A. who

B. which

C. whom

D. whose

答案：

(答案→)A. who

B. which

C. whom

D. whose

解析：本题考查的是定语从句中关系代词的用法，根据先行词为人，同时又在从句中作主语，所以选A