1.

Why is Brian so surprised?

   Because he has not seen Diane for a week.
   Because he meets Diane in the street.

2.

What are Diane's changes all about?

   She has lost weight and has dyed her hair.
   Her hair is longer and has lost some weight.

3.

What happened to Diane?

   She has a husband and two kids.
   She got married about two years ago.

4.

How does Brian feel?

   Really surprised.
   Really annoyed.