For those fluent in Spanish, please help

Which verb phrase correctly completes this sentence? ana y julia en el mar. a. están nadando b. estamos nadando c. estás nadando d. estoy nadando

Which sentence contains a completed action? when i was a child there was a fair in my town every year. i won a prize at the fair last year.

2oraciones independientes utilizando las siguientes palabras era y jugo