01.10.2021 (10)

   

https://www.englishpage.com/gerunds/gerunds_infinitives_30.htm 

1     https://www.englisch-hilfen.de/en/exercises/if_clauses/multiple_choice2.htm    

2      https://test-english.com/grammar-points/b2/unless-even-if-provided-as-long-conditionals/ 

3 http://www.blairenglish.com/exercises/emails/exercises/email_complaint/email_complaint.html   

4     https://en.islcollective.com/video-lessons/untitled-video-lessonhow-to-deal-with-the-customers-complain