Hello XXXX,

I hope you are having a wonderful day, thank you for coming! I have attached the slides for you to look over.

For homework, these are some exercises you can try.

Here are some more grammar exercises on this topic:
https://www.englisch-hilfen.de/en/exercises/tenses/simple_past_progressive.htm

Here is a listening exercise about computer problems:

Computer Problems – Listening Lesson (B1-B2)

Finally, look at the final slide of the PDF. Write a short text answering the 4 questions.

Have a good week and let me know if you have any questions or requests,