DAVID USED TO SMOKE 20 CIGARETTES A DAY.A. DAVID OFTEN SMOKES 20 C...

31. - KIEM TRA 1 TIET - SO 1- HK1
KIEM TRA 1 TIET - SO 1- HK1
31. David used to smoke 20 cigarettes a day.A. David often smokes 20 cigarettes a day. B. David often smoked 20 cigarettes a day.C. David didn’t use to smoke 20 cigarettes a day. D. David is used to smoking 20 cigarettes a day.