---Stanly has graduated from the university.

---It’s no wonder that I can’t see him these days. He ___ in the city for six years.

A．has stayed

B．had stayed

C．stayed

D． has been staying

根据上下文，在文中横线处填入最恰当的语句．()

A．丁香

B．月光

C．桂花

D．校园