раскройте скобки употребив глагол в подходящей видовременной форме I assure you that this (be) the first time we (receive) a complaint​

WELCOME TO RUSSIA
You arrived to Russia. It's very beautiful country! There you can find a lot of great monuments, parks, forests.You must taste the Russian food, but the cities, of course, too! I think the most interesting city to visit is Saint Petersburg. You can look at the bridges, go to the theatre or just walking in Alexandrovsky garden. Then you can go to Petergof, there are very beautiful views, sea and fountains. 
So next you decide to go to Moscow. Of course, you'll attend Red Square, GUM and if you arrived in winter, you must visit the rink on the Red Square! 
After...
Можешь ещё написать про другие города, это просто кратенький план :)