Final answer:
The phrase that best completes the sentence is 'nos gusta'.
Step-by-step explanation:
The correct phrase that best completes the sentence is nos gusta.
This phrase means 'we like' in English. The sentence would then read: 'Mi familia y yo vamos a Hawái mañana porque nos gusta la playa.', which translates to 'My family and I are going to Hawaii tomorrow because we like the beach.'
The phrase 'les gusta' would mean 'they like,' 'me gusta' would mean 'I like,' and 'te gusta' would mean 'you like.'
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