A. why English has become a global language B. how many people in the world speak English C. how people in the world learn English as a foreign language D. whether we need to worry about English being a world language 参考答案:D 答案解析:[解析] 通过理解全文内容以及作者的观点,我们可以知道人们大可不必顾虑英语作为世界语言的前景问题。