Mark A, B, C or D to indicate the correct answer in each of the following questions

Here are the correct answers for the questions in the exercise:

1. **Question 1:** C. produced
2. **Question 2:** B. couldn't have solved
3. **Question 3:** C. will help
4. **Question 4:** A. would have taken
5. **Question 5:** D. would show
6. **Question 6:** A. will
7. **Question 7:** B. were learning
8. **Question 8:** C. may
9. **Question 9:** D. would
10. **Question 10:** B. accepted

Make sure to double-check these answers with the context of your lesson or textbook to confirm their accuracy!