Sentence1: Tone-deaf Melanie and her talented pal tried out for choir at school. Sentence2: Melanie only mouthed the words, while her friend sang aloud. Sentence3: The music teacher was impressed and accepted them into the choir. Sentence4: The teacher gave Melanie and her pal a duet to sing at the concert.
Her friend got sick, so Melanie had to sing by herself.