Many people believe that hunger is only a problem in the developing world. , it is a problem all over the world.
A. For one thing
B. In addition
C. As well
D. On the contrary
网友回答
A. For one thing
B. In addition
C. As well
(答案→)D. On the contrary
解析：短语辨析。A一方面；B而且；C也；D恰恰相反；句意：很多人都认为饥饿只是发展中国家的问题，恰恰相反，它是一个全世界的难题。根据句意说明D正确。