20. let out 泄漏 / 发出(声音) / 释放 / 放宽(衣服)

21. look forward to 盼望

II. Sentences

1. There are various reasons why people write poetry. Some poems tell a story or describe something in a way that will give the reader a strong impression. Others try to convey certain emotions.

人们写诗有各种各样的原因。有些诗是为了叙事，或描叙某事给读者以强烈的印象。而有些是为了传达某种感情。

2. They delight small children because they have strong rhyme and rhythm and have a lot of repetition.

这些童谣能使孩子们快乐，因为它们节奏感强，又押韵，而且重复多遍。

3. We would have won if Jack had scored that goal.(对过去的虚拟)

如果杰克踢进了那个球的话，我们就赢了。

4．It is not a traditional form of English poetry but it is very popular with English speakers.

它不是英诗的传统形式，但在说英语的人们中间，这种诗是很流行的。