— Who is Lisa?
— She is an _____ student.
A:eight year old
B:eight-year- old
C:eight-years old
D:eight years’ old
某长途汽车客运公司规定旅客可免费携带一定质量的行李,当行李的质量超过规定时,需付的行李费 y (元)是行李质量 x ( kg )的一次函数.已知行李质量为 20 kg 时需付行李费 2 元,行李质量为 50 kg 时需付行李费 8 元.
-- Excuse me. Where _______ Andy ________ from?
-- Nanjing.