她冷得发抖。

She ___shivered with cold.

可怜的狗——它在发抖！

The poor dog - it's ___shivering!

她发抖不仅是因为冷，还因为她不知道要告诉他什么。

She was ___shivering not only because of the cold, but also because she had no idea what she was going to tell him.