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Last Sunday was [a] beautiful day, so my friends and I went to the beach. We played volleyball all [the] morning and swam in the afternoon. We had so much fun, but I forgot to [put] on [the] [sunscreen]. When we left the beach, we [were] sunburnt all over our arms and back. My sunburn was so bad that later that day I can't even [lie] on my back. It really [teaches] me a lesson. Next time I will be more careful.