Relier deux phrases en une seule avec un pronom relatif COD Reformulation

Dans chacune des paires de phrases suivantes, relier les phrases par un pronom relatif COD.

This is the movie. We watched this movie yesterday.

We are eating the cake. My mother made this cake.

They are playing with a ball. The ball is Jimmy's.

We live in a house. My father built this house.

I am doing an exercise. I don't like this exercise.

They are looking for their keys. They lost their keys.

You gave me a pen. I lost this pen.