Ko cần ghi rõ ràng ạ chỉ cần đáp án là đc r

16.Alan took a photograph she a. didn't look looked 17.I a. lose b. lost 18.Last night Tine_ heard a scream. a. read read 19. We come? of Sandra while c. hasn't b. wasn't looking d.. hadn't looked my key. Can you help me look for it? c. had lost d. have lost in bed when suddenly she b. ...