Mr. Smith gave us ______ on how to learn English well. [ ]

A. some advices

B. many advices

C. some advice

D. an advice

矿业工程直接工程费有（）。

A.流动施工津贴

B.水泥材料购置费

C.通风机租赁费

D.运输系统人工费

E.营业税