—Is this your baseball David? —No its not . Its Helens.A. hisB. yoursC. mineD. hers

问题补充：

—Is this your baseball, David? —No, its not . Its Helens.

A. his

B. yours

C. mine

D. hers

答案：

A. his

B. yours

(答案→)C. mine

D. hers

解析：句意：这是你的棒球吗，David？不，它不是我们的，它是Helen的。A他的；B你的；C我的；D她的；结合题意选C。