问题
选择题
Rose told her father that she wanted a new bike.
A．Nine-year-old
B．Nine-years-old
C．Nine year old
D．Nine years old
答案
答案：A
此题重点考查合成形容词的基本构成，数词+名词(+形容词)；合成形容词中的名词(year, hour, metre, month等)必须用单数形式。
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