We haven't heard from David since he left Shanghai.[对划线部分提问] since he left Shanghai[画线]

来源：学生作业帮助网编辑：作业帮时间：2024/05/09 12:41:21

We haven't heard from David since he left Shanghai.[对划线部分提问] since he left Shanghai[画线]
We haven't heard from David since he left Shanghai.[对划线部分提问] since he left Shanghai[画线]

We haven't heard from David since he left Shanghai.[对划线部分提问] since he left Shanghai[画线]
How long have you heard from David since he leave shanghai?