1.

1. The postbox is emptied every day.

2. The stamps are postmarked at the post office.

3. The letters are sorted into the different towns.

4. The mail is loaded into the train.

5. The mailbag is unloaded after their journey.

6. The bags are taken to the post office.

2.

The postbox was emptied yesterday.

2. The stamps were postmarked at the post office.

3. The letters were sorted into the different towns.

4. The mail wass loaded into the train.

5. The mailbag wass unloaded after their journey.

6. The bags were taken to the post office.

3.

1. The postbox will be emptied tomorrow.

2. The stamps will be postmarked at the post office.

3. The letters will be sorted into the different towns.

4. The mail will be loaded into the train.

5. The mailbag will be unloaded after their journey.

6. The bags will be taken to the post office.