IV. Complete the description with *at, for, during, by, until or in*.

The city of London was found by the Romans (1)_______ the year 43 AD. (2)_______ the next few years it quickly became the main trading centre in Britain. (3)_______ two hundred years after the Romans left, the city was almost forgotten. Its full importance did not return (4)_______ the eleventh century. (5)_______ the end of that century, the government of England was based in Westminster and the Tower of London had been started. (6)_______ the Middle Ages London continued to grow, and (7)_______ the time of Shakespeare it had become a prosperous capital city with many fine buildings. Unfortunately, most of these buildings were made of wood and (8)_______ 1666 they were almost all destroyed by a fire which lasted (9)_______ several days. This was a great tragedy for the people living there (10)_______ that time, but it is true that many of the areas which are most attractive today were planned (11)_______ the rebuilding which followed.