Надо соединить в одно ! 1. last year i went to paris. i stayed there for a week. 2. i stayed with louise. she is my french cousin. 3. she introduced me to pierre. his knowledge of paris is amazing. 4. my favorite building was the invalides.

Last year I went to Paris where I stayed for a week. 
I stayed with Louise who is my French cousin. 
She introduced me to Pierre whose knowledge of Paris was amazing.