【題目】I know Simon is ____________boy. He can swim and ride.

A. a 11-year-old B. an 11-year-old C. a 11-years-old D. an 11-years-old

【答案】B

【解析】句意:我知道Simon是一個11歲的男孩,他會游泳和騎車。11-year-old是一個合成詞,11歲的,起到形容詞的作用,修飾名詞,year不用復數(shù)形式,故C和D不對。a和an都是不定冠詞,修飾可數(shù)名詞單數(shù)形式,表示泛指一個,an用于元音發(fā)音開頭的單詞前,11這個數(shù)字的發(fā)音第一個音是元音/i/,故應用an,選B。

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