单选题 Few people have the time that is required to master a "full" knowledge of a foreign language and ______ still would be to make the much practical use of such a language.
A. more B. less C. much D. fewer

【正确答案】 D
【答案解析】[解析] 从空白处前面的and可知，这两个句子为并列关系，主语均是people，为集合名词，排除B和C选项。如果空白处填A选项，则是更多的人在实践中使用外语，从而会与前面的分句形成转折关系。而D选项为“更少的人”，与前一分句形成并列关系。因此，D项为正确选项。