第15题: [填空题]While the wife is on a business trip, what should she encourage her husband and children to do 参考答案:(She should encourage them)to cook a few simple meals 答案解析:问题中出现了两处提示词: the wife和encourage。根据提示词,可以在文章的第三句话得出,“If you are married,it is a good idea to encourag