What you said his sorrows(悲伤)．
A：added
B：added to
C：added up
D：added up to
——I hear you______ in a sports center. What's it like?——Well, it's very hard work and I'm always tired, but I don't mind.
-3的倒数是（ ）
同学们每天在教室里上课，围绕我们教室里的声现象，正确的观点是（ ）
