“What are you doing here?” I'm ________ my pen. I can't ________ it.”

[　　]

　　A． find; look for

　　B． finding; look for

　　C． look for; find

　　D． looking for;find

I'm ________ my pen, but I can't ________ it.

[　　]

（翻译）我正在给我的笔友写信。

　　I'm ____ ____ ____ _____ ______ my pen friend.

　　“What are you doing here?” I'm ________ my pen. I can't ________ it.”

[　　]

　　A． find; look for

　　B． finding; look for

　　C． look for; find

　　D． looking for;find

—What are you doing?

—I’m_______ my pen. But I can’t _______it.

A. finding; look for             B. looking for; look for  C. looking for; find     D. finding ;find