题干
Xi Jinping, our president, paid a visit to Harbin last month. How encouraging!
A：63 years old
B：63 years' old
C：63-year-old
D：63-years old
答案(点此获取答案解析）
C
Xi Jinping, our president, paid a visit to Harbin last month. How encouraging!
A：63 years old
B：63 years' old
C：63-year-old
D：63-years old
