I _______ YOU A LETTER IF I HAD KNOWN YOUR ADDRESS.A. WOULD HAVE S...

20. - KIEM TRA 1TIET BAI SO 1 HOC KY 2 KHOI 12 CB 20. - KIEM TRA 1TIET BAI SO 1 HOC KY 2 KHOI 12 CB
KIEM TRA 1TIET BAI SO 1 HOC KY 2 KHOI 12 CB
20. I _______ you a letter if I had known your address.A. would have sent B. would send C. will send D. sentA. already B. ever C. lately D. now