Я не иду в школу по субботам и по воскресеньем, потому что в эти дни мы не учимся.
1. were planted
2. are played
3. will be given
4. were invited
5. was answered
6. plays
7. will be gathered
8. burned
1) Yes, I use a phone.
2) The pluses are: you can talk to your friends with the help of the phone.
You can use your phone for searching an information and so on.
The minuses are: now people don't like to talk to real people, they prefer talking on the phone.