题目内容
17.一套钥匙a set of keys.分析 a set of keys.
解答 答案:a set of keys.表示一套…用a set of…,后加复数keys,故答案是a set of keys
点评 有些不可数名词或者复数名词,如news,fvrniture,bread,shoes等,如果要表示"一个"这类概念时,就需要用"a(an)+单位词+of+名词"这种结构.
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