题文
Not until all the fish died in the river how serious the pollution was.
| A．did the villagers realize |
| B．the villagers realized |
| C．the villagers did realize |
| D．didn’t the villagers realize |
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Not until all the fish died in the river how serious the pollution was.
| A．did the villagers realize |
| B．the villagers realized |
| C．the villagers did realize |
| D．didn’t the villagers realize |
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