| 1 | The capital of the United States is Washington. | |
| 2 | We're going to the capital to conduct research work. | |
| 3 | The traffic in the capital is very busy and needs to be better managed. | |
| 4 | The main street of the capital is crowded with pedestrians and vehicles. | |
| 5 | The capital has many famous tourist attractions, such as Tiananmen Square. |
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