Поставить вопросы к предложениям.
1.I have known her since 1999.(How long?)
2.Christmas is the most popular holiday in Great Britain.(What)
3.I am very busy at the moment.I am preparing for my English exam.(Why?)
4.Students of our group want to go to the excursion.(Who?)
5.It costs650$ to fly to New York.(How much?)