【題目】 A set of ______ on the table.

A. key is B. keys is

C. keys are D. key are

【答案】C

【解析】

試題分析：句意：一串鑰匙在桌子上。key鑰匙，單數(shù)形式；keys復數(shù)；are用于主語是復數(shù)或是you的時候；is用于主語是單數(shù)的時候。句中a set of表示一串...，故key應用復數(shù)形式，be動詞也應用復數(shù)are。故選C。

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