Getting the two leaders to sign the peace treaty was his greates

Getting the two leaders to sign the peace treaty was his greatest________ . （accomplish）
【正确答案】：accomplishment
【题目解析】：原句的意思是“让这两位领导人能够签署和平条约是他最伟大的成就”。因此这里需要填的是个名词，我们填accomplishment。