Hi, Hasib. These sentences work, however only as newspaper article or video titles. Often grammar is abbreviated to save space. If you were formulating a sentence to be used in any other context you would absolutely have to put an article (grammatical one not the newspaper one!) before "press conference." You could either say "Trump exits a press conference..." or "Trump exits the press conference..." depending on whether or not your readers would know which specific press conference you would be referring to with "the." Additionally, I would change the first one to "challenged him" or "after being challenged by female reporters." However, how you have it written is not incorrect per se. For some reason replacing "after" with "following" sounds better to make "Trump exits (a/the) press conference following female reporters challenging him." Lastly, if we are staying in this pseudo-title-grammar, the sentence could be altered and become "Trump exits press conference following challenge from female reporters" which sounds better than " Trump exits press conference after female reporters challenging him."

You can also say "Cornavirus brought the world to an impasse." (from the French word "passer") But I like Lena's synonym much better! This one is not as common and might be better written rather than spoken.

It is a difficult question to clearly answer because, in short, when and while both are correct. However there is a slight nuance between these two adverbs. I would posit that "while" places more of an emphasis on the period of time you spent in the park and the elapsing of that time spent walking, where as the adverb "when" does not place the same amount of weight on the elapsing of the time you spent walking in the park but rather to the fact that it happened as a single event in the past. You were walking and then weren't. Boom. Again these are subtle differences, and you can feel comfortable using the two interchangeably for the most part. Although you would most likely use 'when' to refer to your childhood or another past time in your life "when I was a kid I ate too much candy." While technically works in that sentence (While i was a kid...) but it doesn't sound as correct to the native ear. For these aforementioned reasons, I would say "while" is the better adverb to use in your sentence, but when is definitely used colloquially in that context too, maybe just less common/correct. Pondering these slight semantic variations means you are approaching fluency. Congratulations! Hope this was helpful!

"Cuocere" refers to the actual act of something transitioning from the state of being raw to the state of being cooked. For example, you would use cuocere in this context: "the hamburger meat cooked too fast on the high heat". Cucinare, on the other hand, is used to refer to the act of cooking or preparing a meal. Like, "I cooked breakfast earlier than usual this morning." Cuocere: La carne deve cuocere a fuco lento. Il sole mi cuoce la pelle oggi. (Here it is used in a slightly figurative sense, that the sun is "cooking your skin" because it is so hot. Cucinare: Mi piace cucinare più di qualsiasi altra cosa. // Ieri ho cucinato la cena per mia madre.