她通过欺骗丈夫来背叛他的信任。

She ___betrayed her husband's trust by lying to him.

他颤抖的声音无意中透露了他的恐惧。

His trembling voice ___betrayed his fear without him realizing it.

在危难时刻抛弃朋友是一种背叛。

It is a ___betrayal to abandon friends when they are in trouble.

尽管他试图保持冷静，但颤抖的声音还是暴露了他的紧张。

His shaky voice ___betrayed his nervousness, even though he tried to stay calm.