this is david()ruler is bluehis，her，he选择

this is david()ruler is bluehis，her，he选择 david is ruler is ()than tom is. Whose ruler is this? Is this red ruler ( ( ) ruler is this? this is( )ruler.写什么 This ruler is for Gao This is a ruler(对a ruler提问) ----- -----this? This is her ruler同义句This ruler __ __ . ThiS ruler is long.同义句 ThiS ruler （ ） （ ) This is（）ruler.（）ruler is yellow. This is my ruler中的my ruler怎么提问? This is my ruler.(划线部分提问)my ruler画线 This is a red ruler 用a red ruler 提问 Is this your ruler?Yes._________. Is this your ruler?改为同义句 What is the length of this ruler? This is a ruler 改为一般疑问句