Special attention should be paid ________our earth from________.
| A．to prevent；being polluted |
| B．to prevent；polluting |
| C．to preventing；being polluted |
| D．to preventing；polluted |
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Special attention should be paid ________our earth from________.
| A．to prevent；being polluted |
| B．to prevent；polluting |
| C．to preventing；being polluted |
| D．to preventing；polluted |
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