— Jack is this your coat?— Yes it is. Thank you.A. meB. myC. mineD. Myself

问题补充：

— Jack, is this your coat?

— Yes, it is. Thank you.

A. me

B. my

C. mine

D. Myself

答案：

A. me

B. my

(答案→)C. mine

D. Myself

解析：句意：杰克，这是你的外套吗？是的，它是我的。谢谢你。Mine为名词性物主代词，做表语，相当于形容词性物主代词加名词my coat；故选Ｃ。