It’s been quite some time since I was last in London

It’s been quite some time since I was last in London 英语翻译Dear Mary,It's quite some time since I last received you How have you been?It had been quite some time since we last It's been quite a while since I last saw you. it's been a long time since I------.How are you?A.had last s it's quite a long time since i _____（hear）from my cousin in It's been a long time since I met you last 译成中文 It's 3 years since I saw him last time.能不能换成it was... It's 3 years since I saw him last time.中的it's 能否换成has been? It's been a long time since I last saw a film.还是It's a long it's a long time since i last saw you It's a long time since i saw you last.