you __(suppose) to turn down your CD player last night.如何做
问题描述：
you __(suppose) to turn down your CD player last night.如何做
答
应该填were supposed
be supposed to do sth是表示应该做但没有做 根据时态应该是过去时 所以be动词用 were.
答
were supposed
be supposed to do应该做什么