她打开那个神秘的包裹时，身体在发抖。

She was ___shaking as she opened the mysterious package.

当他不得不发表演讲时，他的手开始颤抖。

His hands began to ___shake when he had to give a speech.

站在悬崖边上，我像树叶一样瑟瑟发抖。

Standing on the edge of the cliff, I was ___shaking like a leaf.