问题补充:
The elderly people still prefer to live in the countryside, city life is considered as convenient and fast.
A. while
B. unless
C. though
D. as
答案:
A. while
B. unless
(答案→)C. though
D. as
解析:C 考察让步状语从句。句义:尽管城市生活被认为是方便快捷的,但是老年人仍然喜欢住在农村。While意为尽管,虽然。故C正确。