I will send you  the homework answers.
>Thank you for finding out the homework and replying to it. Please continue to do that if we continue to have problems. Sumi massen.

1. I usually use Windows as my browser for these lessons.
2. I know how to use Word and Excel.
3. I don't know if I can open it.
4. I usually have lessons at school.
5. a. I'm connected to Wi-Fi at home.
   b. I'm connected to school free Wi-Fi at school.
6. I'm sorry, I have not received the mail, so I don't know.
7. I'm sorry, I don't understand it.
8. I have never been abroad.
   If I have the opportunity to go abroad, I would like to go to America.
   Because I would like to count down New Year at Times Square in New York.

It may be my mistake, but the reply to my mail has not arrived.

Once you check again and find a reply, I will reply to The fast (first) message.
I'm waiting for your reply.

Sincerely,
Tama.