大吵一架后，她发誓再也不踏进他的办公室。

After their big argument, she vowed never to ___set ___foot ___in his office again.

这位探险家是第一个踏上那座偏远岛屿的欧洲人。

The explorer was the first European to ___set ___foot ___on that remote island.

进入考场前我紧张得手都在抖，但当我踏上讲台开始做陈述时，一股自信油然而生。

I was so nervous that my hands were shaking before I ___set ___foot ___in the exam hall, but I felt a surge of confidence the moment I ___set ___foot ___on the stage for my presentation.