Most of his books are said ______ into several languages already. [ ]

A. to be translated

B. being translated

C. to have been translated

D. translate

美发服务成本一般包括：设备、房屋折旧（或租金），原材料物质消耗及（）等。

A.清洁费

B.劳动报酬及管理费

C.环保费

D.医疗费