The officials have expressed over the safety of the mine workers trapped in the mine．
A. appetite
B. wealth
C. reward
D. concern
网友回答
A. appetite
B. wealth
C. reward
(答案→)D. concern
解析：词义辨析题。 句意：政府官员表达了对矿难被困工人安全的担忧。A．appetite 口味 B．wealth 健康 C．reward酬劳D．concern 担忧根据语境选D