Adapted practice prompt

瑜伽课背痛，建议寻求

You are a university student. mild back pain has become worse and you should not attend tomorrow's yoga class. Write an email to Yoga Instructor to explain the absence and ask how to return safely.

In your email, do the following:

1. 1Apologize directly for the change or inconvenience.
2. 2Explain the reason briefly without making excuses.
3. 3Propose a fair alternative or next step.

根据主题改编，非 ETS 官方原题。