The bedroom (has been cleaned ) already.

祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟,请及时采纳,多谢 !1，the books (send) to us in two days.must后面跟什么词1后面的in two days 什么意思1. will be sent 2. must 后跟动词原形 3. in two days 两天后