U 4
1 https://elt.oup.com/student/headway/beg/grammar/grammarunit13/hwy_begin_unit13_1?cc=cz&selLanguage=cs pres. cont.
2 https://elt.oup.com/student/headway/beg/grammar/grammarunit13/hwy_begin_unit13_2?cc=cz&selLanguage=cs pres. cont.
3 https://elt.oup.com/student/headway/elementary4/grammar/unit03/hwy_elem_unit03_2?cc=cz&selLanguage=cs pres. simple
4 https://elt.oup.com/student/headway/elementary4/grammar/unit03/hwy_elem_unit03_3?cc=cz&selLanguage=cs pres. simple
5 https://elt.oup.com/student/headway/elementary4/vocabulary/unit09/?cc=cz&selLanguage=cs places
6 http://anglictina.chrustova.eu/cviceni/present-simple-vs-continuous.php
7 countries, nationalities: https://learnenglishkids.britishcouncil.org/en/word-games/countries
8 family members: http://www.englisch-hilfen.de/en/exercises/family/scrambled_letters2.htm