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? )