他脸色苍白，说话时声音颤抖。

He looked pale, and his voice ___shook as he spoke.

她接受奖项时，激动得声音都在颤抖。

Her voice was ___shaking with emotion as she accepted the award.

审讯期间，嫌疑人的声音开始发抖。

During the interrogation, the suspect's voice began to ___shake.