responsible, hard-working, warm-hearted 三个形容词修饰它

　　3)在名词highways 后面加上定语从句which have brought much convenience to the local citizens.

　　例2、Factories have discharged gas and liquid.(6个单词)

　　In the developed areas, the newly-built chemical factories have discharged harmful and even poisonous gas and liquid which had a seriously negatively impact on the surrounding environment.(拉长后31个单词)

　　例2中短句拉长的步骤：

　　1) 在句首，加上地点状语in the developed areas

　　2) 在名词factories前面加上两个修饰形容词newly-built和chemical

　　3) 在名词gas and liquid 后面上加上一个定语从句which had a seriously negatively impact on the surrounding environment.

高分句式二——插入语

　　增加句式复杂性的另外一种方法就是使用插入语。中国学生写的英语句子喜欢一通到底，没有任何语气的间歇，像一根笔直的竹竿，因此笔者称之为“竹竿句”。而英美人士写的句子则不同，他们偏爱插入语，通过插入语表现出作者语气的间歇和停顿。有了插入语，读者眼中的句子有一种跌宕起伏的感觉，这种句子像海浪