题文
People have planted a great many trees in order to________ wind and sand in the desert.
| A．hold down |
| B．hold up |
| C．hold back |
| D．hold out |
推荐试卷
People have planted a great many trees in order to________ wind and sand in the desert.
| A．hold down |
| B．hold up |
| C．hold back |
| D．hold out |
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