(A)

1. https://www.english-4u.de/en/grammar/past-simple.htm

2. https://www.english-4u.de/en/tenses-exercises/past-simple.htm

3. https://www.english-4u.de/en/tenses-exercises/past-simple2.htm

4. https://www.english-4u.de/en/tenses-exercises/past-simple4.htm

5. https://www.english-4u.de/en/tenses-exercises/past-tense.htm

6. https://www.english-4u.de/en/tenses-exercises/simple-past.htm

(C)

1. https://www.myenglishpages.com/site_php_files/grammar-exercise-simple-past.php
2.