A、What makes life enjoyable. B、What a community means. C、How to work with tools. D、How to improve health. C录音提到，参与这个项目使女孩对自己家的外观

Farmington, Utah, is a more pleasant community since a local girls 4-H club improved Mam Street. [16] Six 4-H girls worked to clean a 72-foot curbside that was covered with weeds, rocks and trash. [17]Each member volunteered to clean up and to dig in plot, five flats of flowers. They also took turns in watering, weeding and maintaining the plot. [18]Participation in this project helped the girls developed a new attitude towards the appearance of their own homes; they’ve learned how to work with tools, and improve their work habits. One mother said that before her daughter was involved in this project, she would not even pull a weed. The experience on Main Street stimulated self-improvement, and encouraged members to take pride in their home grounds and in the total community. City officials cooperated with the 4-H members in planting trees, building cooking facilities, picnic tables, swings and public restrooms. The 4-H girls planted trees and took care of them during the early stages of growth. The total park project needed more plantings in the following years. [19]Members of the 4-H club a-greed to follow the project through to completion, because they receive satisfaction from the results of constructive work. The project is a growing one and has spread from the park to the school and the shopping center. Trees and flowers have all been planted in the shopping center, making the atmosphere pleasant.
16. What do we learn about Main Street in Farmington?
17. What did the 4-H club members do about the curbside?
18. What have the 4-H girls learned from the project?
19. Why did the 4-H girls agree to follow the park project through to completion?