Несколько вопросов по английской грамматике и лексике

1 Translate the words given in brackets
Young people tried to get (за кулисы) to the dressing rooms to speak with the actress.
(in the wings)?

2 Fill in prepositions or adverbs
We passed (a) the door we came (b) box-office where the tickets are sold. <в учебнике, по видимому, забыли напечатать артикль "а" перед "box-office">
a - through, b - into?

3 The seats in the theater are bund (a) their numbers, but if you can`t do that an usher will show you to your seats.
a - ?

4 We wanted to go (a) wings to see the actors making up.
a - in?

5 What expression do we use if we want to say that we remember something very well?