People all over the world are all about the relationship between China and Japan.A. tired

问题补充：

People all over the world are all about the relationship between China and Japan.

A. tired

B. concerned

C. interested

D. talked

答案：

A. tired

(答案→)B. concerned

C. interested

D. talked

解析：考查形容词辨析：A. tired疲劳的，B. concerned担心的，C. interested感兴趣的，D. talked这不是形容词，只有B项搭配介词about，句意：全世界的人都担心中国和日本的关系。选B。