Our room is big,but theirs bigger than our.这里为什么用的是theirs不是their?

our room is big,but theirs is bigger than ours.whats on the table?nothing. our room is big ,but () is bigger than ()A their:our B their;ours C theirs:ours D theirs:our Our room is big,but theirs bigger than our.这里为什么用的是theirs不是their? Our sitting room is big.的同义句是什么? There is nothing but a big box in the room. Our room is not as big as yours .这句话的意思是什么? How big is the room? I like the room,______it is not big or bright.A.because B.so C.but this big room is ______sale .but it won't be ________ sale. Our classroom is very big,but ___(they) is small.适当形式、、 Our school is very beautiful,but it is not ver big. （）school is big,but（）is small.A.Our；theirB.Our；theirsC.Ours；their（）school is big,but（）is small.A.Our；theirB.Our；theirsC.Ours；their快点! Our school is not big but very [b ]括号填单词 Our country is very big. 改错:it is nice and big room there is a big sitting room翻译 The room is very big改为感叹句 Our room is ______ this.A three times as big as B as three times big as并帮我讲解一下这种结构