Group A & B: You have already read the text on page 34 once (looking for past simple verbs).
1) Now read the text again.
2) On page 35, do exercises 1 (writing a summary), 2a and 2b (vocabulary).
3) On page 36, do exercises 3 (using the simple past) and exercise 4 (asking and answering questions in the simple past).
4) Start memorizing verbs on the irregular verb list. You will need them for the Schularbeit!