Ответы и объяснения

We could open this door at that moment. 2) I wasn't At home in the evening the day before 3)Mary translated from English into Russian without any mistakes 4) he used to invite everybody to his birthday every day 5) some people in our class ate ice cream for breakfast 6)she used to listen to very loud music 7) he tried to help everybody. Ps-не знаю, разрешено ли вам used to употреблять здесь