他捐了一个肾给他的妹妹。

He ___donated a kidney to his sister.

冒着生命危险，他捐献了大量血液来救我。

Putting his own life in danger, he ___donated a large quantity of blood to save me.

经过慎重考虑，她决定捐献一部分肝脏来帮助一位陌生人。

After careful consideration, she decided to ___donate a portion of her liver to help a stranger.