I am surprisd that they have watched it 改为同义句

I am surprisd that they have watched it 改为同义句
I am surprisd that they have watched it 改为同义句
 

I am surprisd that they have watched it 改为同义句
2. To my surprise 3.Why didn't 4.was walking 5.to do

To my surprise

To my surprise, they have watched it.