1) I was late for class this morning because the alarm clock didn't _______. A. set off B. take off C. go off D. come off 2) Find mistake: - The boy are looking for the key which he lost last night. A. are looking B. for C. which D. lost - The local residents showed their disapproval about the new traffic scheme. A. The local residents B. showed C. their disapproval D. about the new traffic (Chọn đáp án và giải thích cho mình nhé!)