单词归类：将下列各组属于同一类别的单词找出，并写在相应的横线上；不属于该类别的写在括号内。
1. 五官类：ear leg eye nose hand
2. 文具类：knife spoon pencil eraser key
3. 运动类：team swim skate empty ping-pong
4. 数字类：ten month hundred Tuesday thousand
1._________________________ ( )
2._________________________ ( )
3._________________________ ( )
4._________________________ ( )
