4 sentences

1. 我听到是两声咔嗒。

   wǒ tīng dào shì liǎng shēng kā​dā.

   I heard two clicks.

   Source: AI Challenger 2017

2. 他咔嗒一声关掉了收音机。

   tā kā​dā yī​shēng guān diào le shōu​yīn​jī.

   He clicked off the radio.

   Source: AI Challenger 2017

3. 如果你能听到他们在地板上的咔嗒声，他们就太长了。

   rú​guǒ nǐ néng tīng dào tā​men zài dì​bǎn shang de kā​dā shēng, tā​men jiù tài cháng le.

   If you can hear them clicking on the floor, they are too long.

   Source: CCMatrix

4. 门咔哒一声关上了。

   mén kā​dā yī​shēng guān shang le.

   The door clicked shut.

   Source: Tatoeba