参考答案

正确答案：D
解析：此句可认为是出于下列的基本句：The civil war did not come to an end until 1949．It is/was+被强调成分+that/who+其他成分，是英语中典型的强调句式。not...until直到……才，例如：It was not until he came that I left．直到他来我才离开。