. WE HAVE BEEN GOOD FRIENDS ______________.A). BEFORE WE HAD LEFT S...

18) - KIEM TRA 15'''' TA 12 BAI 14 15 16
KIEM TRA 15'''' TA 12 BAI 14 15 16
18). We have been good friends ______________.A). before we had left school B). after we had left schoolC). when we were at school D). since we were at school