IF YOU ….. THE FRONT DOOR CAREFULLY, THE THIEVES WOULDN’T HAVE BROK...

9. - BT TRAC NGHIEM VE CAU DIEU KIEN
BT TRAC NGHIEM VE CAU DIEU KIEN
9. If you ….. the front door carefully, the thieves wouldn’t have broken into your house.A. have locked B. locked C. would lock D. had locked