1  Li   Hu   is   taller   than   his   little   sister.     
2.Li   Hong   and   Liu   Xia   are   twin   sisters. 
3.It‘s   not   necessary   to  be the   same.    
4.These    women   enjoy   exercising  every   day.    
5.They   【both去掉】   are   in   the   same   school.    
6.Miss   Ge   goes   to   a   lot   of   parties.    
7.He   is   not   as   good at   math    as   Li   Guang.    
8.He   often   goes   to   school   on   foot .    
9,He   will   come   back   in   half   an   hour.    
10.The   three   studests   are   all very   tall.