Вставьте to be в нужной форме: a flight for moscow tomorrow? yes, there. 2) there. snow last winter. 3) there. a conference next week. заранее!

1) Is there a flight for Moscow tomorrow? - Yes, there is.
2) There was much snow last winter.
3) There will be a conference next week.

Will there be a flight for Moscow tomorrow? Yes, there will be. В вопросе мы видим "указатель" будущего времени "tomorrow" (завтра) There was much snow last winter. Почему "snow" с "was"? Потому что snow - plural noncountable. There will be a conference next week. Аналогично с первым мы имеем указатель будущего времени next week