“用于答复下级单位的请示事项”，是指哪种公文种类？（）
A.批复
B.意见
C.函
D.会议纪要
参考答案：A
It is _____ to come into the teacher's office without his permission. [ ]
A. bad manner
B. a manner
C. manners
D. bad manners
I am thirsty. I want to drink some ______. [ ]
A. apples
B. oranges
C. ice cream
D. orange
