You may know the song Happy Birthday very well, but do you know about its writer? It 【小题1】 (write) by an American girl. And she has bee a very rich woman. When she was a child , she was poor. Once she was invited to her friends’ birthday party. She had no money 【小题2】 ( buy) presents for them. She was sad. Her mother said “【小题3】 (not worry). How about 【小题4】 (sing) a song together? Happy birthday to…” She decided to write it down and 【小题5】_(sing) it to her friends at the party. They sang and sang “We 【小题6】 (not hear) such a song before.” The party ended up singing a song. Later the girl became well known in America.was written
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(答案→)was written
解析：这篇短文主要讲述了生日快乐歌，这首歌曲的由来。
【小题1】联系上下文可知此处指的是它是由一个美国女孩谱写的。结合语境可知本句描述的是过去的动作，故用一般过去时态。主语是动作对象，故用被动语态。填：was written。谱写，写。
【小题2】结合语境可知此处指的是她没有钱给他们买礼物。不定式做宾语补足语表示具体的将要进行的动作，结合语境可知填不定式to buy，买。做补足语。
【小题3】结合语境可知她母亲说的是不要担心。英语祈使句的否定形式一般是don’t+动词原形。故填：Don’t worry，不要担心。
【小题4】结合语境可知此处指的是唱首歌怎么样。本句中about是介词，后面接名词或者动名词作宾语，结合所给单词，可知填动名词singing，唱歌。
【小题5】结合语境可知此处指的是唱歌他的朋友听。联系前文不定式符号to，可知填原形动词sing，唱。
【小题6】结合语境可知此处指的是，我们以前从来没有听到过如此的一首歌。结合语境可知本句描述的是现在已经完成的动作，故用现在完成时态，填：haven’t heard