Our teacher has a _____ for thinking up ways _____ his speeches attractive. [ ]

A. gift, of making

B. gift, to making

C. knowledge, of making

D. knowledge, to make

一般情况下，（），按岗位分工要求开始监测溢流。

A.二开后

B.一开后

C.三开后

D.以上都不是