The woman is my neighbour.A. 70 years oldB. 70-years-oldC. 70 year oldD. 70-year-old

问题补充：

The woman is my neighbour.

A. 70 years old

B. 70-years-old

C. 70 year old

D. 70-year-old

答案：

A. 70 years old

B. 70-years-old

C. 70 year old

(答案→)D. 70-year-old

解析：修饰名词的量可用连字符将它们连在一起，但不可以使用复数，故选D。