HE WILL GET FAT IF HE ……… SMOKING. A. STOPS B. HAD STOPPED C. DID ST...

BAI TAP CAU DIEU KIEN ANH VAN LOP 10 CAU DIEU KIEN

19. Unfortunately, I didn't have address. If I _________ it, I would have sent you a postcard. A. had B. have had C. had had D. have