Respuesta :
Recordemos que para hacer una oración en presente perfecto debemos tener:
Sujeto + Have / Has+ Verbo en pasado participio + Complemento
Las oraciones quedarían así
They have ridden a camel. It was fantastic! (ride)
I have flown on a plane. I think it’s dangerous. (fly)
Nina has swum in the ocean. She fears water. (swim)
My friends have lived here for a long time. (live)
Oscar has eaten scorpions. He doesn’t like to try new things. (eat)
Has he danced rock?
I have lost my watch! Help me!
Patty has travelled around the world. She visited 10 countries last year!
(travel)
Has he driven a truck? No, he hasn’t.