HE’S HAS BEEN STUDYING REALLY VERY HARD, ………. HE CAN PASS THE EXAMS....

BAI TAP TRAC NGHIEM ANH VAN CUC HAY CHO MOI CAP DOCO DAP AN DAY DU

Câu 21: He’s has been studying really very hard, ………. he can pass the exams.A. so B. but C. however D. therefore