Mary is girl,but she knows a lot about science.A.a eight-year-old_英语解答

Mary is girl,but she knows a lot about science.
A.a eight-year-old B.eight-year-old
C.eight years old D.an eight-year-old

人气：100 ℃　时间：2019-09-21 06:14:23

解答

D.an eight-year-old为什么？加上连字符，eight-year-old就相当于一个形容词再加上eight 的e是元音，所以前面用an