Peter is a brilliant language leaner. Within two weeks, he has developed a good _______ of Chinese and Japanese.A.mitmentB.descriptionC.transformationD.mand
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D解析考察名词辨析。Commitment 承诺，保证 description 描述 transformation 转换，变形 mand 命令，控制，指挥A good mand of sth 意为对……很精通