第23题: [单项选择]Though Mum is very busy, she always______ some time every day to read to her children. A. sets off B. sets in C. sets aside D. sets up 参考答案:C 答案解析:短语辨析题。set off“动身、出发”;set in“降临”;set aside“留出、余出”;set up“建立、成立”。根据句意,C为正确答案。句意:尽管妈妈非常忙,她还是每天留些时间给孩子读书