accept
首先把would rather have accompanied his parents to the supermarket 用括号括上,这是一个整体,意思就是宁愿.胜过.,整体意思就是宁愿做这件事儿
然后,would rather do than do 是固定搭配,所以,填动词原型would ratherhave accompanied （do）his parents to the supermarketthan accepted（标准答案这么写的）但是看前面的 have accompanied不是 原型。 而且最前面有个 The other day。过去发生。 所以犹豫了。我还是觉得是原型，would rather do than do 是固定搭配啊，最权威的你还是问问你们班级的英语老师吧，看看是不是答案错了，敢于质疑，能深入研究，你真的很棒