书证的副本，应当附有关制作过程的文字说明及原件存放处的说明，并由制作人签名或者盖章。
参考答案：对
Not far from the house ____ two gardens, ______ seated nearby playing bridge with his children．
A．were; whose owner
B．was; of which the owner
C．were; its owner
D．was; owner of which
认真阅读给定资料，简要回答下面问题。
请结合你对给定资料的理解，概括“空巢老人”的内涵。 要求：简明、准确。不超过150字。
