问题补充：
单选题Liping’sbrotherisanboy.A.eighteen-years-oldB.eighteen years oldC.eighteen-year-oldD.eighteen year old
答案：
C解析此题重点考查合成形容词的基本构成；因8的第一个音素是元音音素，故不定冠词用an.
时间：2019-12-01 08:39:13
单选题Liping’sbrotherisanboy.A.eighteen-years-oldB.eighteen years oldC.eighteen-year-oldD.eighteen year old
C解析此题重点考查合成形容词的基本构成；因8的第一个音素是元音音素，故不定冠词用an.
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Li ping’s brother is an boy.A. eighteen-years-oldB. eighteen years oldC. eighteen-year-old
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