The waiting lists for a bed in a public elderly care home in Beijing have grown long that some are saying it could take 100 years to get a position.
A. very
B. too
C. quite
D. so
网友回答
A. very
B. too
C. quite
(答案→)D. so
解析：句意：在北京等待公共养老院床位的名单很长以至于一些人说可能需要100年才能得到一个位置。so...that...是固定句型，表示“如此……以至于……”，符合句意。