The book shelf over there is ------填所有格,是Mary's and jane还是Ma

The book shelf over there is ------填所有格,是Mary's and jane还是Ma there an interesting book on the shelf.（问号那填什么?是is还是are?） The table over there is Tom and Jane's.为什么这里不用Tom's and Jane The woman over there is Julia and Mary’s mother Mary's and Jane's /Mary and Jane's ( ) fathers work in the s The CD walkman is over there.It is___the shelf. 是Jane and Lucy's father is a teacher,还是Jane's and Lucy's? Is there _____ useful book on the shelf? It must be Mary's.Mary‘s到底是名词还是形容词性的所有格?换成“她”该怎么填? There is only one seat over there.It's Mary and Lucy ( ) is a pencil.Look!It's over there.这里是填this还是that? Tom’s best friend is Mary. 名词所有格用法,请问如果说my best friend is Ma