英语翻译I don't know what they --- --- ---in the room.

are doing
再问： 中间是三个空
再答： 我认为是给多了一个空 因为‘他们在做什么’ 是 what are they doing ? 放在从句中要用陈述语序，即 what they are doing
再问： 可是这三个空我同学填得出来
再答： are doing now