事故被清理后，高速公路变得畅通。

The highway was ___clear after the accident was cleared away.

她总是保持桌子整洁以提高工作效率。

She always keeps her desk ___clear to improve productivity.

暴风雪过后，城市努力使道路保持畅通。

After the snowstorm, the city worked hard to make the roads ___clear.