当他看到蛇时，他的声音带着明显的颤抖。

There was a noticeable ___quiver in his voice when he saw the snake.

她小心翼翼地打开箭袋，取出一支箭。

She carefully opened the ___quiver and took out an arrow.

他的声音因为紧张而微微发抖。

His voice ___quivered slightly from nervousness.