1.  As he strolled on towards the pub he was surprised at the number of people that were about.

2.  Auster was surprised at the success of his latest Novel.

3.  He had been surprised at how big she was, but she was absolutely fantastic.

4.  He was surprised at how grown up Anne suddenly appeared although she was still as light-hearted as ever.

5.  He was surprised at how small her waist was.

6.  He was surprised at the vast basement area that was used for medical research beneath the Alexander Fleming House building.

7.  I find people are often surprised at how little it costs.

8.  I was surprised at the lack of expression on his face.

9.  I was surprised at the way he blew up at Hardy.

10.  I was surprised at what transpired.