她在结冰的小路上小心翼翼地向前迈了一步。

She took a cautious ___step forward on the icy path.

他向后退了一步以便看得更清楚。

He took a ___step back to get a better view.

每走一步，她的脚就疼得更厉害。

With every ___step, her feet hurt more and more.