—There's a(n) ______ on the board saying that there will be an English speech contest next week.

—That's great. It is a good chance for us to improve our oral English.[ ]

A. advertisement  

B. advice  

C. letter

D. notice

酱卤制品煮制过程中的火力，一般都是（）。

A、先旺火，后文火

B、先文火，后旺火

C、旺火

D、文火