upon

他脸上带着微笑回答。

He answered with a smile ___upon his face.

她头上戴着一顶黑色天鹅绒帽子。

She wore a black velvet hat ___upon her head.

她头上戴着一顶黑色天鹅绒帽子。

___Upon her head she wore a black velvet hat.