请问The pair of boots （ ）made of wool.Look at the pair of boots,（ ）made of wool.第二个能不能是they're.老师说是这个,为什么?

请问The pair of boots （ ）made of wool.Look at the pair of boots,（ ）made of wool.第二个能不能是they're.老师说是这个,为什么?
请问The pair of boots （ ）made of wool.
Look at the pair of boots,（ ）made of wool.
第二个能不能是they're.老师说是这个,为什么?

请问The pair of boots （ ）made of wool.Look at the pair of boots,（ ）made of wool.第二个能不能是they're.老师说是这个,为什么?
The pair of boots （is ）made of wool
主语是the pair
第二个句子：Look at the pair of boots,（ ）made of wool 填不了
应该是改成Look at the pair of boots made of wool.改成一个简单句,made of wool过去分词作后置定语
可以用they are