_____HE HAD WORKED HARD, HE FAILED TO PASS THE EXAM.A, EVEN B, ALT...

20, - KIEM TRA 1T LOP 12 LAN 2
KIEM TRA 1T LOP 12 LAN 2
20, _____he had worked hard, he failed to pass the exam.A, Even B, Although C, While D, Now what