A. they didn't know who Father Christmas was

　　B. they knew that Father Christmas wasn't real

　　C. they thought their father was Father Christmas

　　D. they knew who put the presents into their stockings

　　4. When the children are older, they __________.

　　A. know that Father Christmas is real

　　B. ask their mother to fill their stockings with presents

　　C. know that Father Christmas is really their father

　　D. know that Father Christmas is really their friend

　　5. Father Christmas comes into the house through the ________.

　　A. chimney    B. back door    C. front door    D. window.

　　KEY: DBACA