四．语法
1. 因为是星期天，学生待在家里。
________ ___________Sunday, the students are at home.
________ ______ ______ Sunday, the students are at home.
2. 当被问是谁时，她说是李萍的朋友。
_______ _______ who she was, she said she was Li Ping’s friend.
________ ______ ______ ______who she was, she said she was Li Ping’s friend.
