Поставьте в правильной ф. He would have understood it if you...slowly.

Поставьте в правильной ф. He would have understood it if you...slowly.
a) have spoken; b) had spoken; c) would speak
If I knew that the traffic lights were red I...
a) would have stopped; b) stopped; c) would stop
The newspaper would print the story if it...true.
a) were; b) had been; c) was
If I had known that you were in hospital I...you.
a) will visit; b)visited; c) would have visited