摘要：10．Not until the press reported the pollution why the water supply had been cut off. A．people did know B．people had known C．had people known D．did people know
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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
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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