Утром я занималась в библиотеке, а

Утром я занималась в библиотеке, а потом у меня были занятия до четырёх часов.
Где ты была вчера вечером? Я звонила тебе с семи до девяти часов.

Результаты (английский) 1:

In the morning I was in the library, and then I had classes up to four hours. Where were you last night? I called you with seven to nine hours.

Результаты (английский) 2:

In the morning I worked in the library, and then I had a class of up to four hours.
Where were you last night? I called you from seven to nine hours.