问题描述: I can't join you because I _____ my sick mother at home.(look after) 1个回答 分类:英语 2014-12-11 问题解答: 我来补答 must/ have to look after 得照顾有不明白的地方再问哟,祝你学习进步! (*^__^*) 展开全文阅读