4. After 6 years of hard work, the Wall (finish)_____ in 128 AD
5. It (be) _____ 117 kilometres long and about 4 metres high.
6. The Wall (guard) ______ by 15,000 Roman soldiers.
7. Every 8 kilometres there (be) _____ a large fort in which up to 1,000 soldiers (find)_____ shelter.
8. The soldiers (watch) _____ over the frontier to the north and (check) _____ the people who (want) ____to enter or leave Roman Britain.
9. In order to pass through the Wall, people (must go) ______ to one of the small forts that (serve) ______ as gateways.
10. Those forts (call) _____ milecastles because the distance from one fort to another (be) ______ one Roman mile (about 1,500 metres).
11. Between the milecastles there (be)______ two turrets from which the soldiers (guard) ______ the Wall.
12. 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.
13. in 383 Hadrian's Wall (abandon) ______. 14. Today Hadrian's Wall (be) ______ the most popular tourist attraction in northern England.
15. In 1987, it (become) ______ a UNESCO World Heritage Site.