Réponse :

4.

A) Don't upload photos of your friends without their permission, they might be angry.

B) Don't tell your secrets online they might strangers that  may come across.

C) Don't lie to your parents about your online friends they might be worried about your or could forbid.

D) When you meet in person someone you have met online, take an adult or a friend with you may get in trouble

5.

a) if I was her, I wouldn't go.

b) if he asks me for my adresse, I will not respond.

c) if you put videos on the internet, they will be here forever.

d) he would keep his friends, if he spent more time with them.

:)