1.the light in the office is still on.someone must be still working 同义句

1.the light in the office is still on.someone must be still working 同义句
the light in the office is still on.someone must be still ___ ___
2.想渐渐了解这些城市最好的方法是步行浏览 翻译
the best way to ___ ___ ___ the city is to visit it on foot