The better _______ you have of words, the better chance you have of saying exactly what you mean.
A．contributionB．commandC．masterD．power
B

試題分析:考查名詞辨析。A貢獻；B掌握，命令；C主人；D權力。固定短語have a good command of “精通，掌握”，所以B選項正確。句意：你對詞匯掌握的越多，你就越可能準確表達清你的意思。
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