Officials in Victoria said on Monday that it would be days _______ the fires were brought under

control, even if temperatures stayed down. [ ]

A. since        

B. when         

C. before          

D. after

户外开关类标志牌的基本形是（）边框及相应文字，标准色：红色。

A.圆形

B.方形

C.三角形

D.不确定