假设你叫王明，昨天收到了笔友David的e-mail，得知他不久要到北京来学习中文。他想了解如何学好中文。请你用英文给他回复一封e-mail，介绍学习中文的体会和方法，提出你的建议，以及表达你帮助他学好中文的愿望。
Having known you are planning to participate in a speech contest concerning refusing to waste food， I’m more than delighted to share with you my thoughts and what I usually do.
