题干
It's said that a young girl took the old lady to the hospital.
A：20 years old
B：20 year old
C：20-years-old
D：20-year-old
答案(点此获取答案解析）
D
It's said that a young girl took the old lady to the hospital.
A：20 years old
B：20 year old
C：20-years-old
D：20-year-old
