http://test.4free.pl/test/516026/62474
https://www.ego4u.com/en/cram-up/tests/conditional-sentences-2
https://englishlearningworld.wikispaces.com/file/view/conditionals-all.pdf
http://www.ecenglish.com/learnenglish/how-use-unless-and-as-long
http://www.englishpage.com/modals/interactivemodal6.htm
http://www.englishpage.com/modals/interactivemodal2.htm
test na niektóre słówka