Hawaii.Grace's family went to Hawaii last week.解析：文中第一句话Last week I went to Hawaii with my family.
Great.The food was great.解析：第一段倒数第二句The food was great. Yes,she did.解析：第二段前三句可看出. They went shopping for clothes the next day.解析：第二段第四句. The people there were very friendly.解析：倒数第二句.
