2 sentences

1. 海军一定在监听。

   hǎi​jūn yī​dìng zài jiān​tīng.

   The Navy's got to be listening.

   Source: OpenSubtitles

2. 警察正在监听犯罪嫌疑人的电话。

   jǐng​chá zhèng​zài jiān​tīng fàn​zuì xián​yí​rén de diàn​huà.

   The police are wiretapping the suspect's phone calls.

   Source: Dong Chinese Dictionary