To our great surprise,the little child knew much.
Grealy/Much to our surprise,the little child knew much.
The little child knew much,which surprised us a lot/a great deal.
We were greatly surprised at what the little child knew.
To our great surprise,the little child knew much.
Grealy/Much to our surprise,the little child knew much.
The little child knew much,which surprised us a lot/a great deal.
We were greatly surprised at what the little child knew.