第19题: [单项选择]Most good writers use every means ______ to make the reader's way smooth and easy. A. at their disposal B. at their request C. at their will D. at their convenience 参考答案:A 答案解析:[解析] at one's disposal意为“听其使用,听其支配”,如:My bike is at your disposal.我的自行车随便你骑。at one's request则意为“应……的