Here are the correct answers for each question based on the context provided:

1. **Question 30:** B. was - fell over
2. **Question 31:** C. started - walked
3. **Question 32:** D. hadn’t had
4. **Question 33:** B. stood - was driving
5. **Question 34:** B. was classifying - prepared
6. **Question 35:** B. was watching - rang
7. **Question 36:** C. was standing - realized
8. **Question 37:** A. invited
9. **Question 38:** C. during
10. **Question 39:** B. met
11. **Question 40:** D. was talking

Feel free to ask if you need explanations or further assistance!