Cement

If a robber robs a house under renovation and accidentally leaves his handprint on wet cement,
Does that mean that the police have concrete evidence?
What do you get if you put a duck in a cement mixer?
Quacks in the pavement.
What do you get if you cross a chicken with a cement mixer?
A brick layer.
What’s black and white and as hard as a rock?
A panda that’s fallen in cement.
There was an old lady from Ghent,
who slept on a bed of cement.
Her bed was well used,
and her body well bruised,
and the back of her head had a dent.