Question

complete the sentences.
most Christians celebrate Christmas on......
At Christmas people have....
On Christmas Eve on...
Children believe that Santa Clause...
Families and friends...
For Christmas Dinner they cook...

Answer 1

1)December 25.
2)
3)
4) arrives on Christmas Eve in a sleigh pulled by a reindeer and brings presents. 
5)
6) stuffed turkey, mashed potatoes, cranberry sauce and a variety of other dishes, pumpkin pie, plum pudding, and fruitcake are favourite desserts.

Answer 2

7 January
give gifts
people cook
come and give gifts
exchange gifts
bird

Это мой вариант