Level 18 interchange 2

Go to the following link and work on the exercises of unit 1 and  2

http://www.cambridge.org/interchangearcade/

Go to the following link and work on the practice of present perfect tense.

https://es.liveworksheets.com/worksheets/en/English_as_a_Second_Language_(ESL)/Present_perfect/Have_you_ever$_aj5445or

Go to the following link and wok on the practice of past simple.
https://es.liveworksheets.com/worksheets/en/English_as_a_Second_Language_(ESL)/past_simple/Past_simple_tense_dc110kf