David made a beautiful musical album. He gave it to his girlfrie

David made a beautiful musical album. He gave it to his girlfriend as a birthday gift, (simple sentence)
【正确答案】：David made a beautiful musical album and gave it to his girlfriend as a birthday gift.
【题目解析】：以上两个句子由于主语一致，所以我们可以用and将其变成一句单句。