问题 更新时间2023/4/3 12:59:00 语法结构 选择最佳答案完成句子 16.An economist is someone( )knows a lot about how goods and wealth are produced and used. A. which B. who C. what D. whom 答案 登录 注册 B 出自:文鼎教育 >> 乐山师范学院基础英语