Complete the gaps (1-7) with the correct derivative of the words

Complete the gaps (1-7) with the correct derivative of the words in bold.
Russian river cruise
Day 9-10: St Petersburg: Arrive in St Petersburg after enjoying a spectacular sunrise breakfast while sailing down the River Neva. Visit the Peter and Paul Fortress, an old prison whose guests have included Peter the Greats own son Alexei, Dostoyevsky, Gorky and Trotsky. See the amazing Winter
Palace, which includes the Hermitage Museum. Housed here are some of historys most important paintings, including the worlds best collection of French impressionists. After your unforgettable journey through this historical city, return to the ship for the captains farewell dinner and your final night on board. The following morning, we will transfer you to the airport for your flight home.