Помогите плиз ☺☺☺☺☺☺☺

Извини,случайно не на твой вопрос ответил вначале. 1.Why do many people learn foreign languages 2.What are they counting 3.When does the plane leave for London 4.How often do they write letters to their friends 5.When does it become dark here late 6.Who is joining us 7.What does it often happen