Complete the sentences with who, which, that or whose only where necessary. Sometimes more than one option is possible.

My oldest sister has had a baby recently, which was a huge event in our family. My little nephew, _______ is the first grandchild of my parents, is the cutest little boy _______ you could ever imagine. My brother-in-law, _______ 35th birthday was only two days before the birth of his son, looks like the happiest and proudest man in the world. He was an only child and often says that kids _______ have no siblings miss out on very important relationships in life, _______ is why he definitely wants to have more children in the future. My sister and I grew up in a house _______ was filled with siblings and cousins and we had a lot of fun, so we both think he’s right about this.