【題目】_____ mother is a teacher.

A. Tom and Bill B. Tom's and Bill

C. Tom and Bill's D. Tom's and Bill's

【答案】C

【解析】句意：湯姆和比爾的媽媽是一名老師�？疾槊~所有格。Tom and Bill's：湯姆和比爾的，指湯姆和比爾共有的…，后面的名詞可用單數(shù)或復(fù)數(shù)；Tom's and Bill's：湯姆和比爾的，指湯姆和比爾各自的…，后面的名詞通常是復(fù)數(shù)；根據(jù)后面的名詞mother單數(shù)，結(jié)合句意和語境可知選C。

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