A2- S3- U8 - A Job`s Fair

http://www.montsemorales.com/gramatica/Condition1-Imag4-21-1.htm

https://www.examenglish.com/grammar/A2_First_Conditional.htm

http://learnenglishteens.britishcouncil.org/skills/writing-skills-practice/more-formal-email

https://elt.oup.com/student/businessoneone/int/a_emailpractice/b11_int_email03?cc=us&selLanguage=en

http://kidseslgames.com/grammar%20games/Conditionals/firstconditional1.html