For practicing Past Simple:
https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises;
https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?05;
https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?06
https://www.ego4u.com/en/cram-up/tests/simple-past-1.
For practicing Comparisons:
https://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs/adjectives/exercises;
https://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjectives_comparison_as_as.htm;
https://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjectives_comparison_sentences.htm.