1) There are a lot of mountains in my country: the Caucasus, the Ural Mountains, the Altai range, the Sayan Mountains and others. The highest mountain of Russia is Mount Elbrus which is 5642 meters tall (it is located within the Caucasus range).
2) No, I have never walked along the top og the cliff.
3) Yes, I have got a favourite beach, it's the Riviera Beach in Sochi.
4) Yes, there is a river in my capital city. It's the Moskva River.
5) тут спрашивается, как далеко от побережья вы живете. Подставьте количество км сами: I live .... kilometers from the coast.
6) A lagoon is is a water body that is formed near coastal areas. It is shallow and has a small link with sea or the ocean though it is also separated from the ocean water with reefs or a low sandbank. A lake is a still water body surrounded by land from all sides except a side where it is fed by a river, stream or any other moving body of water. Lakes are far away from oceans and seas.
7) I saw the sea for the first time when I was five (или укажите свой возраст) years old.
8) I have never got lost in a forest. (to get lost = потеряться/заблудиться)
9) The nearest hill to my home is ... (напишите название холма/горы, ближайшего к вашему дому)
10) I think rocks are more dangerous than than waves.