单项选择题
If you don't give（）smoking, you'll never get better.
A. off B. up C. out D. in
单项选择题 We （）our dinner when a policeman came to the door.
单项选择题 John kept quiet about the accident （）lose his job.
单项选择题 —（）are you trying to prove to the police —Where I was last night.
