---This is my sister Ann.-Is a student?A. sheB. heC. herD. his

问题补充：

---This is my sister Ann.

---Is a student?

A. she

B. he

C. her

D. his

答案：

(答案→)A. she

B. he

C. her

D. his

解析：根据上文的内容This is my sister Ann，故选用代词为she ，故选答案为A