My brother has been painting the new house all day and I don’t know when he can finish the work.
问题描述：
My brother has been painting the new house all day and I don’t know when he can finish the work.
改为同义句My brother has been painting the new house all day and I 三个空 when he can finish the work.
答
have no idea不知道的意思,等同于don't know.希望对你有帮助!