Actividad con cronología de Timetoast

Les dejo una actividad que incluye una cronología de Timetoast.
Les pego a continuación la consigna que iría en una hoja de trabajo.

Passive voice practice

Look at the timeline. Find pairs of events related to these categories.

http://www.timetoast.com/timelines/passive-voice-practice

Satellites

Submarines

Medicine

Airplanes

Mobile communication standards

Then, write at least three sentences about each pair. Follow the model.

Model:

Satellites: The Americans launch Explorer 1. / The Russians launch Sputnik 1.

Explorer 1 was launched by the Americans on January 31st, 1958.

Sputnik 1 was launched by the Russians on October 4th, 1957.

Both Explorer 1 and Sputnik 1 were launched in the 50s.

Sputnik 1 was launched before Explorer 1.