I would have asked him to attend our gathering but I ___ his address.
                    举一反三
- 13. I would have asked him to attend our gathering but I ____ his address. A: didn’t know B: hadn’t know C: don’t know D: wouldn’t known
 - If I ______ his email address, I would have sent him a message yesterday.
 - , I would have given you his address.
 - __________, I would have given you his address. A: If you asked me B: You had asked me C: Should you have asked me D: Had you asked me
 - If I (__) his e-mail address, I would have sent him a message yesterday. A: have know B: had known C: will know D: know
 
