Answer:
2) Hace una hora que trabajé.
Explanation:
Trabajé desde las tres hasta las cinco. Ahora son las seis.
Hace una hora que trabajé.
<em></em>
<em>I worked from three to five. Now it's 6pm.</em>
<em>1) I have been working for two hours.</em>
<em>2) I have worked one hour ago.</em>
<em>3) I worked in a supermarket.</em>
<em>4) I have been working for two days.</em>
<em />