1. Since morning there was very different atmosphere in the town from that of yesterday.
2. I shouldn't be surprised if he turns up tomorrow.
3. I compared his essay with Mushtaq's and found both of those almost the same.
4. What we have discovered in this particular job is that diligence is more important than being bright.
5. No one but he could had told them that I was the king.

I hope, all of these are correct.

__________________
"A successful person is one who can lay a firm foundation with the bricks that others throw at him." (David Brinkley)