补全对话：A：Are they __?B ：No.they are Tom's.

补全对话：A：Are they __?B ：No.they are Tom's.
补全对话：A：Are they __?B ：No.they are Tom's.

补全对话：A：Are they __?B ：No.they are Tom's.
Are they yours?或者填其他某个人的,如：Are they Jack's?
要根据上下文来回答.
如果是人名,就加's,如果是代词,就用名词性的物主代词.

好象没有标准答案，可以说：
Are they yours?
Are they Jame's？等等。

It's a picture of our classroom.

这得联系上下文判断啊
要是没有上下文，可以填一个yours