| 21. | Some birds sing in order to attract a mate. |
| 有些鸟鸣叫是为了吸引配偶。
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| 22. | When we sing this song ,miss out the second and fourth verses. |
| 唱这首歌时，我们不唱二四两节．
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| 23. | He exclaimed that, to start the company, he would sing himself. |
| 他大声说道，为了带个头，他将亲自唱歌。
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| 24. | They finally prevailed upon her to sing a folk song for them. |
| 他们最后使得她同意给他们唱一首民歌。
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| 25. | Sing us just one song, Helen, come on! |
| 海伦，给我们唱支歌，快唱吧！
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| 26. | People have come from all corners of the country to hear this lady sing . |
| 人们从全国各地赶来听这位女士演唱。
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| 27. | Sing the last chorus again. |
| 把最后的合唱部分再唱一遍。
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| 28. | The young man pulled himself up to his full height and began to sing . |
| 年轻人挺直身子，开始唱起来。
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| 29. | You can sing your cares away! |
| 你可以用唱歌来消除忧虑
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| 30. | Don't be afraid, sing out! |
| 不要害怕，大声唱
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