13. I have to email my teacher to let her know that I cannot ____ the live session.assistattend

It looks like you're looking for the right word to fill in the blank in your sentence. The options provided are "assist" and "attend." The correct choice here is "attend," as it appropriately conveys that you cannot be present at the live session.

Here’s how you might structure your email:

Subject: Unable to Attend Live Session

Dear [Teacher's Name],

I hope this message finds you well. I am writing to inform you that, unfortunately, I cannot attend the live session scheduled for [insert date and time].

I appreciate your understanding, and I will make sure to catch up on the materials covered during the session. If there are any specific resources or notes you recommend for me to review, please let me know.

Thank you for your support.

Best regards,
[Your Name]

This format is polite and professional, ensuring your teacher understands your situation clearly.