What colour is your vest? [ ]
A. It's white.
B. It's 25 yuan.
C. It's a vest.
答案:A
---Do you know the danger caused by smoking?
---Yes, too many cigarettes can lead to_______ lung cancer.
A.a person suffers from
B.a person to suffer from
C.a person being suffered from
D.a person suffering from
区域经济基础设施由那些内容组成?