What do you know about secondhand smoke? Secondhand smoke is not good for health. Aside from this, I don't know well about secondhand smoke.
Hello Jun Kyu! Great job! Thank you for completing the homework. Secondhand smoke indeed harms health. If you'd like, I can provide more information on the topic. Just let me know! By the way, your answer is grammatically correct, but it could be improved for clarity and completeness. Here's a revised version:
^^ T. Arah
Secondhand smoke is not good for health.
>>> Secondhand smoke is harmful to health.
Aside from this, I don't know well about secondhand smoke.
>>> Besides this, I don't know much about secondhand smoke.