Question

【题目】Tony is ________ student.
A.an 11-year-old
B.an eleven-years-old
C.a 11-year-old
D.a eleven-year old

Answer 1

【答案】A
【解析】句意: Tony是一个11岁的学生。这里是复合形容词（数词—year-old）作定语，因为11是以元音开头的单词，所以应该用冠词an.故选A。