Question

Задайтеобщие вопросы и дайте краткий ответ:They will celebrate Sam's birthday?

Answer 1

Will they celebrate Sam's birthday? Yes, they will.

Answer 2

Will they celebrate Sam's birthday? - Yes they will.
Who's birthday will they celebrate? - They will celebrate Sam's birthday.
What will they celebrate? - They will celebrate Sam's birthday.
Who will celebrate Sam's birthday? - They will celebrate Sam's birthday.