adjective
1
DUBIOUS : When we heard about the accident, we were all surprised and didn't know what to say.
GOOD : When we heard about the accident, we were all shocked and didn't know what to say.
◆◆◆
When someone is surprised and upset because something unpleasant has happened, they are shocked : 'When reports came in that the child's body had been found, everyone was deeply shocked.'
2
BAD : Paola was very surprised for the low prices.
GOOD : Paola was very surprised at the low prices.
BAD : I was pleasantly surprised about the variety of food in England.
GOOD : I was pleasantly surprised by the variety of food in England.
◆◆◆
surprised at/by sth (NOT about/for/of etc ): 'I was surprised at the difference in their ages - he was old enough to be her father.' 'I knew she would do well and wasn't at all surprised by her results.'