Simon is very regretful. If he had been more careful, he _____ such a big mistake.

. ----You just think of yourself! You kept me waiting for at least three hours．----I am sorry that you _____ think so. 

 If you had told me in advance, I ___ him at the airport. 

He suggests we ____ to the cinema at once, otherwise we ____ late. 

I＿＿＿＿＿＿it again.