系统解析:由题干中的may farmers be able to do with robots 定位到文章首段首句:Perhaps it is time farmers to put their feet up now that robots are used to inspect crops, dig up weeds, and even have become shepherds, too. 事实细节题。文章开篇第一句就提到,也许现在是农民翘着脚休息的时候了,接下来解释说, 这是因为机器人被用来检查庄稼,挖杂草,甚至成为了牧羊人。由此可见,当机器人出现于农业劳作的场景中时,农民或许可以享受休闲时光了,故答案为B。