题目内容

Not having a good ________ of English can be a serious disadvantage to achieving your goals.
A．protectionB．appreciationC．commandD．experience
C

试题分析：句意：没有掌握好英语，可能会成为实现你的目标途中的一个严重地劣势。have a good command of是固定用法，意思是精通，选C。
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