The forests are getting fewer and fewer. We must _________ down too many trees.
| A．keep people from cutting | B．prevent people from cutting |
| C．stop people cutting | D．all the above |
The forests are getting fewer and fewer. We must _________ down too many trees.
| A．keep people from cutting | B．prevent people from cutting |
| C．stop people cutting | D．all the above |
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