It was strange that he _____ have uttered such rude remarks on that occasion. 

I insisted that the boy          his hands before having supper.

“Would you have told him the answer had it been possible?” “I would have, but I ＿＿＿＿so busy then.” 

If we ___ the other road, we might have arrived here in time for meeting.

 If I ________ your advice then, I think that the crops could be growing better.