问题
选择题
He is an_________boy.
A．8-year old
B．10-year-old
C．18-year-old
D．8 year old
答案
C
18-year-old为合成形容词。因为前面有an，所以决定了只能选C。
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He is an_________boy.
A．8-year old
B．10-year-old
C．18-year-old
D．8 year old
C
18-year-old为合成形容词。因为前面有an，所以决定了只能选C。