在多年毫无作为之后，这位政治家的承诺听起来空洞无力。

The politician's promises ___ring ___hollow after so many years of inaction.

他的道歉显得不真诚，因为他从未直视我的眼睛。

His apology ___rang ___hollow because he never looked me in the eye.

没有任何证据支持，她的借口在整个委员会听来都显得空洞。

Without any evidence to back it up, her excuse ___rang ___hollow to the entire committee.