He doesn't know ,Who is he?【合二为一】Mary wants to know,What does think of the trip[合二为一】
问题描述：
He doesn't know ,Who is he?【合二为一】Mary wants to know,What does think of the trip[合二为一】
答
He doesn't know who he is.
Mary wants to know what he thinks of the trip（缺主语吧 帮你加个）
答
He doesn't know who he is
Mary wants to know what he thinks of the trip
答
应该是：
变成复合句,关键是要把从句变为陈述句语序
同时要注意从句与主句时态要一致
He doesn't know who he is.
他不知道他是谁
Mary wants to know what he(she) thinks of the trip.
玛丽想知道他(他)对这次旅游是怎么想的.
答
He doesn't know who he is.
Mary wants to know what he/she thinks of the trip.
这两句都是宾语从句，基本上把两个分句中的问句的疑问语序改成陈述语序就可以了。