1.How many brothers and sisters has got Terry?
2.Who is grandfather Tracy and David's?
3.How many children Brenda has got?
4.Who are Terry and Brenda's parents?
5.How many grandchildren have got Arthur and Shirley?
6.Who is David and Tracy's uncle?
тут могут быть грамматические ошибки, но не смысловые, ибо писала я по памяти