There is in our office that when it is somebody’s birthday they bring in a cake for us a

问题补充：

There is in our office that when it is somebody’s birthday, they bring in a cake for us all to share.

A. balance

B. tradition

C. concern

D. relationship

答案：

A. balance

(答案→)B. tradition

C. concern

D. relationship

解析：考察名词词义辨析。A平衡；B传统；C担心，担忧；D关系；句意：在我们办公室里有一个传统，当某个人过生日的时候，他们会带一个蛋糕来和我们分享。根据句意说明这是我们一直在做的事情，故传统这个意思与上下文较为贴切。故B正确。