题文
The natural resources, such as mine, forest, and hydropower （水电）in that area have been __________.
| A．developed |
| B．exploited |
| C．improved |
| D．expanded |
推荐试卷
The natural resources, such as mine, forest, and hydropower （水电）in that area have been __________.
| A．developed |
| B．exploited |
| C．improved |
| D．expanded |
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