— Whose pen is this?— Oh it’s. I was looking for it everywhere.A. youB. yoursC. meD. mine

问题补充：

— Whose pen is this?

— Oh, it’s. I was looking for it everywhere.

A. you

B. yours

C. me

D. mine

答案：

A. you

B. yours

C. me

(答案→)D. mine

解析：句意：这是谁的笔？哦，是我的，我正四处找它呢。句中要用名词性物主代词，其用法相当于名词，后面不用接名词；A 你，你们；人称代词；B 你的/你们的；名词性物主代词；C 我，宾格；D 我的；名词性物主代词；故选D。