题目内容
My aunt has a______son.
A.four-years old |
B.four-year-old |
C.fourth-year-old |
D.four-years-old |
【答案】
B
【解析】合成形容词的基本构成。a/an+数词-名词(必须为单数)-形容词。用a还是an要由数词的第一个因素是辅音因素还是元音因素。
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