警方逮捕了一名窃听者，他一直在非法监听商业竞争对手的电话。

The police arrested a ___wiretapper who had been illegally listening to business rivals' phone calls.

警方逮捕了一名试图监听政府官员通话的窃听者。

The police arrested a ___wiretapper who tried to eavesdrop on government officials' calls.