these bikes under building C are theirs 对划线部分提问划线部分是theirs

these lunch boxes are (theirs).括号里的theirs划线提问. These are photo.划线部分提问.划线部分是:photo These cats are theirs.(对theirs提问） These are basketballs 对划线部分提问 basketballs划线 These are his pens (对划线部分提问）划线部分是his pens These are Lily's pens 对划线部分提问（划线部分是Lily's） these are Japanese cars .对划线部分提问 划线部分是 Japanese cars Those apples are (theirs) 对括号部分提问 these presents are different form Kitty's 对划线部分提问(划线的是Kitty' They are under the desk.(对划线部分提问) The butterflies are theirs.对theirs提问. These are my sisters 对划线部分提问（划线部分：sisters）.Those are my brot