1) you (get) bad marks at school if you don’t stop spending so much time online
2) you (not have) any real friends if you use social networking
3) you (use) social networking, you’ll lose your privacy
4) you sleep) very well if you go online just before you go to bed
1 will get
2 won't have
3 If you use
4 won't sleep
Объяснение:
Will get
Won’t have
If you use
Won’t sleep