5 A: Lisa (study) hard last night when I called her. B: I know. She always (work) a lot before the exam.

5 A: Lisa (study) hard last night when I called her.

В данном случае нужно использовать Past Continuous, так как действие происходило в определенный момент в прошлом.

B: I know. She always (work) a lot before the exam.

Здесь следует использовать Present Simple, так как речь идет о регулярном действии.

Правильные ответы:

1. A: Lisa was studying hard last night when I called her.
2. B: I know. She always works a lot before the exam.

Ответ:

1. Lisa was studying hard last night when I called her.
2. She always works a lot before the exam.