mary's ruler is much longer than______ A.are all B.are both C.both are Dall are为什么为什么

Mary’s ruler is much longer than [mine]. 括号中为什么用mine. 请解析. mary's ruler is much longer than______ A.are all B.are both C.both are Dall are为什么为什么 Whose ruler is it?It's -----a.Peter b.Peters c.Mary's d.Peters' 比较级 做什么句子成分 Mary's ruler is much longer than mine.请问is后面一块做什么句子成分能回答比较详细及有相关语法补充的就更好了,先在这里谢过了. mary's watch is than Ann's.A.much nice B much nicerC more nicer ruler is it?it is Tom＇s ruler. The ruler is orange.同义句It's[ ] [ ]ruler 语法练习.1.My shoes are brown.2.The girl is in Class 4,Grade 6.完成对话.______this your ruler,Mary.______ _______ is it It is red.No,it is not my ruler.My ruler _______ yellow ._____ ruler is it?I think it is Tom 's.You can ask him.语法练 ______?That's my ruler.A.Whose ruler is it?B.What ruler is it? Kate is Mary's Joe's handwriting is ________ Mary's?Joe's handwriting is ________ Mary's.A.more better B.as well asC.much better than D.more better than what's that?（ ）is a ruler Excuse me,is t()ruler Jim's? is ben’s ruler longer than mine sarah's ruler is 20cm.Amy's ruler is 10cm （sarah's ruler is 20cm.Amy's ruler is 10cm （ 合并成一句话） Is that Mary?Right ,she's nice and i like()very much Is that mary ? Right. she's nice and Iike ( )very much这道题怎么做啊? 直接引语变间接引语 How much is Mrs Yang's robot?Mary wants to ask_____________________________.