Answer:
A- I'd see if your friendship develops online (1) before meeting.
B- You could find out if you're still friend's (2) while taking on the phone first.
C- I'd only agree to meet her (3) after discussing the situation with your parents.
D- You could avoid arguments about the past (4) by bringing a friend with you.
Step-by-step explanation:
Corrected grammar in sentences.
Here you go...