______ I'd have told you.

A:If I would have known it B:If I had have known it C:Had I known it D:Should I known it

______ at the price list, he'd have known what to expect.

A:Had Mr. Robinson looked B:If Mr. Robinson looked C:If Robinson would have looked D:Had Mr. Robinson been looking

_____about it earlier, we could have wamed people of the danger.

A:Would we know B:Should we know C:Have we known D:Had we known

If only I （ ） that was the last chance I could talk to her.I would have said to her,“Hi,my dearest mom! I love you”.

A:had know B:know C:have known D:knew

If only I （ ） that was the last chance I could talk to her.I would have said to her,“Hi,my dearest mom! I love you”.

A:had know B:know C:have known D:knew

If only I （ ） that was the last chance I could talk to her.I would have said to her,“Hi,my dearest mom! I love you”.

A:had know B:know C:have known D:knew