Исправьте грамматические ошибки в следующих предложениях(степени сравнения) 1. London has become the 10th expensivest

1. London has become the 10-th most expensive city in the world. 2. Cleveland is now one of the cleanest cities in North America. 3. The London Underground is worse than the Tokyo Underground system. 4. Ireland is not so large as Sweden. 5. The Moscow Underground is cheaper and much more comfortable than the one in London. 6. The tallest office buildings in the world are in New-York. 7. Prague is Central Europe\'s most glamour city. 8. The weather in England is more changeable than in Russia. 9. London is older than Washington. 10. Business people say that London is the most exciting of all the major cities in the world. 11. Londoners also say that it is cleaner than it used to be, and much safer than many other European cities. 12. The new photocopier is as reliable as the old one.