Правильный вариант - это I will be celebrating.
Объяснение:
Нужен вспомогательный глагол.В данном предложении им выступает be.
2. Behind bikes
3. To home
4. Behind the back
5. at the entrance to the house
She gave me her telephone number and I gave her mine.
Или
She gave me her telephone number and I gave her my telephone number.