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Look at the time lines below to make sentences which contrast two different actions. Use "already" in each sentence. The first has been done for you.

1. Personnels \ installation\ instruction \ of a computer \now
2. Operator's\ testing\ training\ the machines\ now
3. Maintenance\ beginning of \ trainer's arrival\ the course\ now
4. Schedule\ sending a\ telex\ now
5. Finish\ an official\ everything\ opening date\ now

1. We had already instructed the personnel before we installed the computer.
2.
3.
4.
5.