1.That is a picture of his family.（对划线部分提问） a picture of his family是划线部分.

1.That is a picture of his family.（对划线部分提问） a picture of his family是划线部分.
______ ______ that?My backpack is on the sofa.(对划线部分提问) on the sofa是划线部分.They are my keys.(改为一般疑问句） __________ __________ your keys?