More forests are being destroyed. As a result, a lot of good earth ________ each year.
| A．is being washed away | B．is washing away | C．are washing | D．are being washed away |
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More forests are being destroyed. As a result, a lot of good earth ________ each year.
| A．is being washed away | B．is washing away | C．are washing | D．are being washed away |
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