was/been/went Last summer I went to London. I did a lot of sightseeing. At first I was in/have been to/went to the British Museum. Which one is correct?

Festivals and holidays What's the difference between "festival" and "holiday"? Can these two words be interchangebale? e.g. New Year is a festival/holiday.

My and my husband's Guys, help me,please! My and my husband's cousins? My husbund's and my cousins? Thanks in advance!

White Hair Guys, I really need your help. Is it possible to say "to white my hair?? Thanks in advance!

Shop assistant or a sales manager? Guys, really need your help! 1)What's the difference between "shop assistant", "sales manager", "salesman"? 2) How do you call a guy who works in a car dealership and sells cars? Shop assistant? Sales manager? Salesman?

Forewarned is forearmed. Out of use? Hello guys! Is the expression "forewarned is forearmed" a bit too high-flown for an everyday life? Is there a more colloquial variant that espresses the same idea? Or perhaps the English and Americans do not use this expression at all? Thanks in advance!

Je recommande ce film Mes amis! Puis-je dire "ce film vaut le coup" quand je veux recommander un film à qn?Y-t-il d'autre variantes d'exprimer cette idée? Merci d'avance!

un haut fond Mes amis! Puis-je dire "elle a un haut fond" ou "son fond est haut"? Merci d'avance!

séparation Mes amis! Puis-je dire " C'est une bonne occasion de se réunir ed de s'amuser apres une longue séparation? Merci,d'avance!