题目Can you keep it ()? People are trying to sleep here! 你可不可以小声点?这边的人还想睡觉呢!A. inB. downC. onD. upCan you keep it ()? People are trying to sleep here! 你可不可以小声点?这边的人还想睡觉呢!A. inB. downC. onD. up题目解答答案B. down