—Is Mary         ?
—No, she is a          girl.

A.twelve years old; fourteen years old.
B.twelve years old; fourteen -year -old.
C.twelve - year - old; fourteen years old.
D.twelve - year - old; fourteen - year -old.

B

解析試題分析:瑪麗是12歲了嗎?不,她是一個(gè)14歲的女孩。12歲。year,要加復(fù)數(shù)。數(shù)次加連字符再加名詞的單數(shù)表示形容詞。故選B。
考點(diǎn):考查數(shù)詞。

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