it was a cold winter’s night . The wind was blowing and thick snow (fall)to the ground

Ответ:

was falling

Объяснение:

it was a cold winter's night. The wind was blowing and thick snow fell to the ground. Пока ветер дул (действие в процессе, длительное), тонкий снег упал (мгновенное) на землю.