把下列句子合并为宾语从句
问题描述：
把下列句子合并为宾语从句
1.when did he leave here?Do you know?
2.where are you from?Can you tell me?
3.where is jim?Do you know?
答
Do you know when he left here?
Can you tell me where you are from?
Do you know where jim is?