听下面一段独白，回答以下小题。
1. What problem is going to be settled?
2. Why is the project really exciting?
3. What do you know about the urban agriculture?
4. What was the average produce of one green roof in the first year?
1. What problem is going to be settled?
| A．Too much rain water. | B．Lack of food. | C．Polluted river systems. |
| A．It helps the city become cleaner. |
| B．It needs to design 5 new roofs. |
| C．It makes full use of urban roofs. |
| A．It requires rebuilding the city. |
| B．It may be the future for food. |
| C．It helps citizens out of starvation. |
| A．650. | B．700. | C．850 |
更新时间：2021-05-20 08:36:53
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【知识点】 科学技术
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