I DON’T HAVE LAN’S PHONE NUMBER. IF I ( KNOW) ……..HER PHONE NUMBER,...

9. - DE KIEM TRA 15 45 SO 1
DE KIEM TRA 15 45 SO 1

9. I don’t have Lan’s phone number. If I ( know) ……..her phone number, I (give) ……..her a ring.