We are all surprised at their rejecting to our invitation.
=We are all surprised at their rejection to our invitation.
I was surprised at seeing him there.
我对在那儿见到他感到很惊奇.He blundered his surprise at her winning the prize.
他不慎说出对她得奖感到惊奇.We are all surprised at their rejecting to our invitation.
=We are all surprised at their rejection to our invitation.
I was surprised at seeing him there.
我对在那儿见到他感到很惊奇.He blundered his surprise at her winning the prize.
他不慎说出对她得奖感到惊奇.