—What is the boy doing?

—It's not necessary for you to be ________ about others' business.

A．connected B．combined

C．contributed D．concerned

 

D

【解析】D　　[be concerned about ...為固定搭配，表示“關(guān)心……”。connect和combine意為“聯(lián)系，結(jié)合”；contribute“貢獻”。]

 

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