This is a picture of Mr. Green's family. 1 the picture we can see Mr. green, Mrs. Green, their son Jim 2  their daughter Susan. Mr. Green is3  in a chair. He is 4 a newspaper. Mrs. Green 5 some housework. Jim is a Middle School student. He is reading a book near the window.
   Look at 6 , she is playing with her toys 7 the floor. She is Mr. Green and Mrs. Green's daughter, Susan. 8 that behind Susan? It's a  9. What's the cat doing? It's playing  10 a ball.

在中国的许多农村乡镇地区，有每逢二、五、八日（或一、四、七日，三、六、九日）到当地的中心集镇赶集交易（也称赶场）的习俗，这种“赶集之风”至少应追溯到（    ）