My parents ____   inHong Kong. They were born there and have never lived anywhere else.    [ ]

A. live    

B. lived    

C. were living

D. Will live

如图显示进入及离开身体某器官的血液内四种物质的相对含量，由此判断该器官是（　　）

A．肺

B．小肠

C．大脑

D．肾脏