我最开始学中文时，我和同学都把这句话直接翻译成“什么上”－太好玩了！

可以说“to get disconnected"（比如 ”sorry, I got disconnected")，或者 "lose your connection"（比如 "I lost my connection").

"Fame and fortune" might be a good idiomatic translation.

You want the "a": "he is a well-known leader".

It's a rude way of confronting someone that is looking at you. For example, if you are on the train in a really bad mood and someone across from you keeps staring at you, you might look him in the eye and say "what the hell are you looking at?". Keep in mind this is quite rude and you are probably better off not using it. Of course, literally it just means "what are you looking at", but with extra emphasis. Technically the other person doesn't have to be looking at you to use it, but as a phrase that's usually what it means.

There are a few words that follow the same pattern, for example prescribe/prescription. It's just a spelling change between the verb and noun forms. My guess as to why would be because pronouncing "describtion" clearly is pretty difficult, so it just turned into "description" over time.

If it's in the past, then "we didn't stay for the rest of the games", present/near future "we aren't staying for the rest of the games", and future "we won't stay for the rest of the games"