题目内容：

阅读下列短文，根据短文内容填空，在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

Tea is an important part of Chinese tradition. As Chinese society developed and progressed, tea production has played a role in driving economic development while drinking tea has remained a practice of daily life.

The practice of tea culture can bring the spirit and wisdom of human beings to a higher level. Tea has an 1. (extreme) close relationship to Chinese culture, and its study 2. (cover) a wide field and has very rich content. There is no doubt 3. it has been beneficial in improving social 4. (achieve) and people’s appreciation of art.