请问Our classroom is as large as theirs句中的theirs 为什么要用复数形式?请问句中的theirs为什么要用复数形式?

A big tree is ( ) our classroom There is a bee in our classroom Our classroom is not ------ as usual .A clean B as clean 请问这题选什么? Our classroom is ____ ____ their classroom.There is a wall _____ the two classrooms there is a blackboard in our classroom 中文翻译 There is (a) bookshelf in our classroom 括号提问 Our classroom is a big o_____.里面填什么? there is a tall tree our classroom 填什么 Our classroom is a big o_____.里面填什么?嗯 classroom,is,photo,this,a,our,of(?)连词成句 Our classroom is ____larger that theirs..A.more B.much There is a teacher desk in our classroom.改错 there is a big （t ）in our classroom our classroom is their classroomour classroom ______ _________is their classroom Our classroom is clean同义句our classroom （） （） Our classroom is home to fifty-five students.请问home 前不加冠词吗? There is a platform in front of our classroom.Two blackboards is on the wall. This is not ____(we) classroom.____(our) is in Building A