--Mom these are my friend Peter and brother Bill.--Welcome to our home. Come in please.

问题补充：

--Mom, these are my friend Peter and brother Bill.

--Welcome to our home. Come in, please.

A. my

B. your

C. his

D. her

答案：

A. my

B. your

(答案→)C. his

D. her

解析：考查代词. my 我的; your你的;his 他的;her她的.句意:妈妈,这是我的朋友彼得和他的哥哥比尔.结合语境可知选C.