THE COMPUTER DOESN'T WORK BECAUSE YOU HAVEN'T …A.PUT IT IN B. PLUGG...

4. - BO DE KIEM TRA HOC KY 1 THI DIEM
BO DE KIEM TRA HOC KY 1 THI DIEM

4. The computer doesn't work because you haven't …A.put it in B. plugged it inC. printed it inD. monitored it in