来自石红生的问题
【should同义词你应该在周五前把书还给图书馆.You---returnthebooktothelibrarybeforeFriday.】
should同义词
你应该在周五前把书还给图书馆.
You---returnthebooktothelibrarybeforeFriday.


【should同义词你应该在周五前把书还给图书馆.You---returnthebooktothelibrarybeforeFriday.】
should同义词
你应该在周五前把书还给图书馆.
You---returnthebooktothelibrarybeforeFriday.
haveto/must/aresupposedto/oughtto