l haven‘t heard from tom recently,l know he is too busy____(

I have not heard from TOM recently,I know he is too busy ___ i haven't heard from him recently. I haven't heard from him( )he went abroad He said"I haven't heard from him since May". Tom is very l( ).He doesn't work every day. I haven't heard from Henry for a long time.But I don't know I haven’t heard from Maria_____. I haven’t heard from him（ ）he left home.A、when B、since C、as 英语he left home two weeks ago and we haven't heard from him__ We haven't heard from David since he left Shanghai.[对划线部分提问] he said ,"i haven't heard from my parents these days".变成间接引语 We haven't heard from David (since he left Shanghai).(对括号部分提