6. Use the verbs in the sentences in the correct tense form.

1. Before the Romans (to come) to Llyn-din ancient people (to live) there.
2. Kyi and his brothers and sister (to travel) for a long time when they (to find) a nice place for a settlement on the bank of the river. O
3. Londinium (to be) in ruins for 400 years before the Saxon kings (to begin) to rebuild it.
4. Kyiv (to become) an important political centre after the state Kyivan Rus' (to appear).​