Question

Mr Green is a doctor of ________ and his daughter Ann is ________ college student.

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A．50 years old; an 18-year-old

B．50-year-old; an 18 years old

C．50 years old; a 18-years-old

D．50-years-old; a 18 year old

Answer 1

答案：A
解析：

点拨：a doctor of 50 years old“一名50岁的医生”，而后一个空是形容词修饰名词college student；l8-year-old (数字-单数名词-形容词) 相当于一个形容词。