I would use dome to describe the round part of the building on the roof, but I would not use vault. If someone told me to look at the vault on the roof in the picture, I would have no idea what they were taking about. If they said look at the dome, I would know right away.

Yes you can.

Examples: Most teams are going for "flavors that they are familiar with". Most teams are going for "flavors that they know well". Most teams are "using flavors that they have used many times before". "Tried and tested" basically means that it is something that you have experienced before. It is not new to you. You know what to expect from that flavor or ingredient. *I used the American spelling for flavours (flavors). * The second part of the sentence should say "one team is taking" NOT "one team are taking".

Fall over is more of a figure of speech. To "fall over" (oneself) - to go out of your way to do something. "Fall down" is used literally, in that your body actually hits the ground, usually unintentionally.

Struggling to Understand Spoken English

I've been learning English for over a year and a half and I still get stressed out every time I watch a movie or series and I don't understand what they are saying. Usually, I can understand what the plot is all about and I get most of the dialogue. But, sometimes a character starts to speak in a very unclear and lazy way and I simply don't understand anything. I even rewind the video to listen to what I didn't understand and then I feel like I just started learning yesterday, because I'm not able recognize any word that comes out of the mouth of that character, even though it seems like a very common and simple sentence.

I'm currently watching the series Breaking Bad. Anyone who has watched the series knows that there are many people who speak in a very informal way and that the main character is a well educated chemistry teacher with a very high vocabulary. Curiously I've found myself understanding his long and complicated dialogues better than those lazy and brief ones from the characters who speak in a kind of improper way.

I really want to understand spoken English, both the informal one and formal one. However, the informal one confuses me with its laziness and the formal one makes my brain hurt with all of those words that I don't know yet. I know even native speakers don't know all of the words in English, I don't know all the words in my own language, but I really want to improve my listening, so I'm going to keep practicing.

Please, correct me if I made a mistake and thanks for reading.

The Pros and Cons of Living in the Country

Advantages
Living in the country has many advantages, but also a few disadvantages. Some of the advantages include a lower crime rate, no pollution or and traffic, a healthier lifestyle due to the clean air, as well as clean and fresh water, beautiful landscapes, meadows, hills, mountains, gardens, farmlands, rivers, fountains, honest and funny villagers, piping shepherd, flock, cattle, naive and sincere people, lower task rate and you name it, not the least , but the last all are advantages of living in a country. (This is a very long "run-on" sentence. I would consider breaking it up into shorter sentences and elaborating on some of the advantages that you mentioned.)
Disadvantages
Living in a country can also be dangerous. You are separated from the rest of the world when there is a for strong snowfall, the transportation system is lacking, and not to mention gale and avalanche. (This sentence and paragraph are incomplete. Separate some of the disadvantages into new sentences and elaborate a little more. I would also use the word "disadvantages" at some point in the paragraph, rather than as a subtitle, similarly for "advantages". I hope I was helpful.)