3 David is Attila because he sometimes gets lost.

3. David is worried about Attila because he sometimes gets lost.

В тексте David Smith's new puppy, Attila, is friendly and intelligent. David is worried about Attila because he sometimes gets lost. Like all dogs in the UK, Attila has got a microchip so the police know his name and address. The microchip isn't new technology but it's David's favourite!

Ответ: worried