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

1. Question 28: **D. were coming - read**
2. Question 29: **C. was playing - was**
3. Question 30: **B. was being - did**
4. Question 31: **A. started - walked**
5. Question 32: **D. hadn't - have**
6. Question 33: **B. was driving - stood**
7. Question 34: **C. was classifying - prepared**
8. Question 35: **B. was watching - rang**
9. Question 36: **C. was standing - realized**
10. Question 37: **A. invited - to**
11. Question 38: **C. during - at**
12. Question 39: **C. will meet - am meeting**
13. Question 40: **D. was talking - was talking**

Let me know if you need any further assistance!