United Nations-17 Goals of Sustainable Development
https://www.youtube.com/watch?v=89tInECFdQ4
MISTAKES IN QUESTIONS B1
https://www.englisch-hilfen.de/en/exercises/questions/mistakes2.htm
B1-B2 QUESTIONS 2
https://www.englisch-hilfen.de/en/exercises/tenses/questions3.htm
B1-B2 PREFIXES ON ADJECTIVES
https://www.englisch-hilfen.de/en/exercises/opposites_adjectives/index.php
TEST ON IRREGULAR VERBS
https://www.englisch-hilfen.de/en/exercises/verbs/index.php
QUESTIONS 1
https://www.englisch-hilfen.de/en/complex_tests/question_tags/index.php
B1 CONJUNCTIONS 3
https://www.englisch-hilfen.de/en/exercises/word_order/conjunctions3.htm
B1 CONJUNCTIONS 2
https://www.englisch-hilfen.de/en/exercises/word_order/conjunctions2.htm
B1 CONJUNCTIONS 1
https://www.englisch-hilfen.de/en/exercises/word_order/conjunctions.htm
ALL TENSES REVISION.ACTIVE VOICE
https://www.englisch-hilfen.de/en/exercises/tenses/mix2.htm