Помогите. Необходимо расставить эти глаголы в подходящем времени. to be, to

Помогите. Нужно расставить эти глаголы в подходящем медли. to be, to happen,to estimate, to explode, to be transformed, to be dead, to call, to know, to blow.
It _____ on the morning of May , 18, 1980 . Suddenly , one of the majestic mountain peaks in the Cascade Range of the North - Western United States - Mount St . Helen ______ its top. Scientists ______ that the mountain ____________ with the force of the million tons of TNT . Within hours over 230 square miles of the beautiful forest ______ into a gray lunarlike wasteland and sixty people _________-.
The Indians of the Northwest once _____ the peak Fire Mountain .
Now the whole world _______ that Mount ST . Helen _____________ indeed a live volcano.