Imagine how excited we were       that our daughter had been employed by the well-known company.

A．learning

B．to learn

C．having learned

D．to be learning

下列选项中，不能列为物业服务成本的是（）。

A.管理服务人员的社会保险

B.公众责任保险费用

C.旅游费用

D.办公费用