simple and progressive present

http://esl.fis.edu/vocab/q21/doing2_r.htm

https://agendaweb.org/verbs/present-continuous-tense.html

https://www.englisch-hilfen.de/en/exercises/tenses/present_progressive_statements_contracted2.htm

http://esl.fis.edu/vocab/q21/doing1_r.htm

https://www.english-4u.de/en/tenses-exercises/present-simple-progressive4.htm

http://www.focus.olsztyn.pl/en-present-simple-and-present-continuous-tests.html#.Xl1ilrcUl0o