食指

___index ___finger

中指

___Middle ___finger

他用手指指着书上的文字。

He is pointing at the words with his ___finger.

他轻轻用手指抚摸着相框的边缘。

He gently ___fingered the edge of the photo frame.

那个告密者指认了偷钱的人。

The informer ___fingered the person who stole the money.