He left home last year and i haven't seen him from then.错在哪

He left home last year and i haven't seen him from then.错在哪 he left home last year and I have never seen him since这句话语法对 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__ He left home two weeks ago and we haven't heard from him__ i haven't heard from my sister since last year My uncle went to Australia last year.We haven't seen him ___ I haven't heard from him last week. I haven't heard from him( )he went abroad He said"I haven't heard from him since May". I haven't seen him for a long time.The last time I _____ (se I met him in 1975 and haven't seen him since.翻译?