If I (know) 1 where he lived, I would have sent a note to him.
举一反三
- If I ____ where he lived, I ____ a note to him.
- 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
- I will leave him a note __ he will know where we are. A: so that B: that C: in order D: in case
- If I ___________his email address, I would have sent him a message yesterday. A: know B: knew C: had known D: have known
- ( )he was seriously ill, I would not have told him the truth A: If I knew B: If I know C: Had I known D: Did I know