Form 6a. Adjectives and Adverbs. Joining sentences

For practicing:
http://esl.fis.edu/grammar/multi/adadv.htm;
https://www.usingenglish.com/quizzes/33.html;
http://www.cityu.edu.hk/elc/quiz/adjadv.htm;
http://a4esl.org/q/j/ck/mc-adjadv.html;
https://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjective_adverb.htm;
https://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjective_adverb2.htm;
https://www.proprofs.com/quiz-school/story.php?title=conjunctions--but-so-1;
http://a4esl.org/q/h/vm/m-sco01.html.

Form 6a. Modals2

For practicing:
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-87468.php;
http://www.focus.olsztyn.pl/en-modal-verbs-practice.html#.XKZMuvZuLDc;
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-97711.php;
https://www.english-4u.de/en/grammar-exercises/modal-verbs.htm;
https://www.english-4u.de/en/grammar-exercises/modal-verbs2.htm;
https://www.english-4u.de/en/grammar-exercises/modal-verbs3.htm;
https://www.english-4u.de/en/grammar-exercises/modal-verbs4.htm;
https://www.english-4u.de/en/grammar-exercises/modal-verbs5.htm;
https://www.english-4u.de/en/grammar-exercises/modal-verbs6.htm.