她头上戴着一顶黑色天鹅绒帽子。

___Upon her head she wore a black velvet hat.

到达后请到接待处报到。

Please report to the reception desk ___upon arrival.

他脸上带着微笑回答：“正如我刚才告诉大家的，你们将在六月底前得到结果。”

He answered with a smile ___upon his face, 'As I just told everybody else, you will have the results by the end of June.'