Поставить артикль The, где необходимо:
... Moscow was built on ... Moskva River in ... twelfth century. Today it is ... world's sixth largest city with a population of almost 10 million. 
   ... St. Petersburg is ... most notherly place of ... world's biggest cities ans has five million inhabitants. The city is situated on forty-four islands in delta of ... Neva.
   As both Hitler and Napoleon discovered, ... winter can be extremly cold with ... temerature droppng as low as a record -42 C in ... Moscow.
   There can be nothing more Russian than the crisp frost of ... winter, ice on ... Neva and show falling upon ... golden cupolas of ... Moscow's churches.