Certificate of Completion

Hi dechen!

Thanks for reaching out.

Currently, you can manually mark such text questions and assignments as 'done'.
To do this, you need to simply click on the empty circle situated on the left of the item's name.
Here's an example.

Please do this for all such items in this course and retry obtaining your certificate.

Hope this helps but please feel free to get back to us should you need further assistance. Thank you.
Best,
Martin