◎ 题干
I think it ______  that one have a good command of English if one wants to be engaged in
international  trade.     
[     ]
A. useful      
B. a must      
C. essential      
D. vital  
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“I think it ______that one have a good command of English if one wants to be engaged in international trade.[ ]A. useful B. a mustC. essential D. vital…”主要考查了你对  【形容词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。