-"DID YOU STUDY LAST NIGHT

1323. - 1926 CAU HOI TN ON THI TSDH VA TN THPT
1926 CAU HOI TN ON THI TSDH VA TN THPT
1323. -"Did you study last night ?"- "No, but if I _______ , I would have done better on has studying today's test." is studying had had studying ahave