After seeing your comment in Penelope's answer, I want you to know that, generally, verbs ending in -άω are considered more formal that the ones that end with -ώ. It's the same verb, with the same meaning, but the proper way to write it is with -άω. In modern Greek, though, the two letters have been joined together into the remaining -ώ.

Hey! It's difficult to understant exactly what you want to say. I'm not even sure if it's supposed to be a question! :/ I hope I'll give you a clear answer though. "Have people thought my cat was one of them?" (people thinking your cat was one of them, a person) in Greek is "Νόμιζαν (αυτοί / οι άνθρωποι) ότι η γάτα μου ήταν μία από αυτούς;" = "NOmizan aftI (capital i) oti i gAta (not g but more like a y sound - as in Yuta; actually replace the u with an a and you have the proper pronounciation of "cat" in Greek!) mou Itan (capital i) mia apo aftOUs?" If it's not supposed to be a question, and you say it like this: "Have people thought my cat was one of them!" (as in OMG how many people have thought my cat was one of them in the past, it's ridiculous!) You can translate that in two different ways (none of which is the exact translation word-to-word) 1)Αν έχουν πιστέψει ότι η γάτα μου ήταν μία από αυτούς λέει! (this way is a more 'informal' way to say something, especially with the "λέει" at the end) = "An Ehoun pistEpsi (think of Pepsi :P) oti i gata mou itan mia apo aftous lEei (that's an L at the start)!" 2)Πολλοί έχουν πιστέψει ότι η γάτα μου ήταν μία από αυτούς. ( a more 'formal' way, not using 'slang'; the exact translation of this sentence in English is "Many have believed my cat was one of them") = POLLi (accent on the last letter; thought it'd clear any confussion if I wrote the word in capitals and the accented letter in small) Ehoun pistepsi oti i gata mou itan mia apo aftous". Hope my romanization helped a bit with your pronounciation and reading of the words! I'll be checking out the Greek section a lot so if you have a follow-up question I might be able to answer that one, as well! :)

These examples aren't synonyms or even definitions of the word "germ". They're quite the opposite, to be honest. "Antibiotic" is mostly a term used for medicine. Penicillin is the first and most widely-known antibiotic in the world I think. "Antibacterial" is anything else that can't be consumed, such as soap, wet wipes, creams, etc. If you break down the word "antibacterial" in Greek, you get "against the bacteria". Now, "antimicrobial" and "antimicrobic" almost mean the same thing. I guess it depends on exactly what you're trying to say using those words, but I think they're mostly medical terms. Again, if you break down those words in Greek (as you can see, they got the same compounds but slightly different endings), you get "against microbes". It's a difficult concept to understand since they're medical terms, but this answer here helped me clear the fog a bit: "A virus is not a living organism. It is simply a chunk of nucleic acid with a protein coat, and has virtually none of the characteristics of life. It doesn't eat, breathe, metabolize or even reproduce on its own. Bacteria are microscopic prokaryotic organisms in the Kingdom Prokaryota. They have no nucleus and lack many of the organelles of a eukaryotic cell. Microbe and germ are nonspecific terms that can mean different things to different people. Microbe just means something microscopic, but is usually used as almost synonymous with germ. Germ is a term usually restricted to any disease-causing agent." I got this from Yahoo!Answers; you can Google it and find the link if you want (I'm not sure if we're allowed to post links from other websites here, sorry!)

The first one is correct. It implies that the teacher had faith in their student and believed she or he would grow up to become "the next Bill Gates". The second sentence implies that the teacher is a time-traveler of some sort; traveled into the future, found out their student becomes "the next Bill Gates", went back in their time, and informed the student of the situation; so now the student also knows they will become "the next Bill Gates" for sure. Such certainty and confidence in saying such a thing is only reserved for close family, in my opinion! A teacher is supposed to be a more rational and realistic character, not go around turning their students into swellheads. So, to recap, using "will" in the sentence shows the teacher simply has faith in the student's abilities, whereas using "would" indicates the teacher is a time-traveler and is 100% sure their student will become "the next Bill Gates". Letting you know, I'm not a native English speaker but I've studied the language for 7 years and I'm still practicing it.

I'd say "Have a safe flight". That's the most usual thing to wish to someone who's going to travel by plane I think. If I recall correctly, my English teacher once told me not to use "trip" when it's about a flight, so I would disagree with Nourani's answer. Also, as you probably understood, I'm not a native English speaker myself, but I studied English for 7 years in the past. Wish you the best, and your friends a good flight! :)