It was Alice and her husband who sent the old man to the hospital, _____? [ ]

A. wasn't it

B. didn't they

C. don't they

D. wasn't he

6502电气集中车站接车进路设有延续进路时，列车全部进入接车线（）后，延续进路自动解锁。

A.30s

B.2min

C.3min

D.5min