【题目】 If you want to do international trade successfully, ______ of English is _______.
A. good command; a must B. a good command; a need
C. a good command; a must D. good command; must
在线课程【答案】C
【解析】
试题分析：a good command of English 精通英语，a must一个必备的东西，句意是;如果你想成功的做国际贸易，精通英语是必备的。选C。