Fill the gaps with the correct tenses (active or passive voice).
- In the year 122 AD, the Roman Emperor Hadrian visited his provinces in Britain.
- On his visit, the Roman soldiers told him that Pictish tribes from Britain's north attacked them.
- So Hadrian gave the order to build a protective wall across one of the narrowest parts of the country.
- After 6 years of hard work, the Wall finished in 128.
- It been 117 kilometres long and about 4 metres high.
- The Wall guarded by 15,000 Roman soldiers.
- Every 8 kilometres there was a large fort in which up to 1,000 soldiers found shelter.
- The soldiers watched over the frontier to the north and checked the people who like to enter or leave Roman Britain.
- In order to pass through the Wall, people (must go) to one of the small forts that (serve) as gateways.
- Those forts (call) milecastles because the distance from one fort to another (be) one Roman mile (about 1,500 metres).
- Between the milecastles there (be) two turrets from which the soldiers (guard) the Wall.
- If the Wall (attack) by enemies, the soldiers at the turrets (run) to the nearest milecastle for help or (light) a fire that (can / see) by the soldiers in the milecastle.
- In 383 Hadrian's Wall (abandon) .
- Today Hadrian's Wall (be) the most popular tourist attraction in northern England.
- In 1987, it (become) a UNESCO World Heritage Site.
