—The air is full of smoke and people are coughing.
—It will get worse________the government does something about the pollution.
| A．but |
| B．unless |
| C．except |
| D．if |
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—The air is full of smoke and people are coughing.
—It will get worse________the government does something about the pollution.
| A．but |
| B．unless |
| C．except |
| D．if |
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