Not until the press reported the polluti
题型:选择题
问题:
Not until the press reported the pollution _________ why the water supply had been cut off.
A.people did know
B.people had known
C.did people know
D.had people known
Not until the press reported the pollution _________ why the water supply had been cut off.
A.people did know
B.people had known
C.did people know
D.had people known