问题补充:
Mary is primary school student in Beijing.
A. a 8-year-old
B. an 8-year-old
C. a 8-years-old
D. an 8-years-old
答案:
A. a 8-year-old
B. an 8-year-old
C. a 8-years-old
D. an 8-years-old
解析:
试题分析: 句意:玛丽是北京的一名小学生。 8-year-old 8岁,做复合形容词,其中的名词保持单数,eight的第一个音标为元音,加不定冠词an,故答案选B.