摘要：Our English teacher has son. A.a 8-year-old B.an 8-years-old C.a 8-years-old D.an 8-year-old 答案:D eight 以元音音素开头.用an 修饰.所以排除A.C两项.8-year-old作定语修饰后面的名词时.year 后面不加-s.

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