Read the text. Choose the correct form of the words in the gaps.

Jimmy’s Family
My friend Jimmy lives in London. He often writes letters to ... \(I\) and I know very much about his family.
Jimmy has a sister. Her name is Betty. She is two years ... \(young\) than Jimmy.
Their parents ... \(be\) doctors. The children call them Daddy and Mummy.
Jimmy’s grandparents live on a farm. Jimmy and Betty like to stay with ... \(they\) in summer.
Jimmy helps his grandfather look after ... \(goose\) and other domestic birds.
Betty often ... \(work\) in the kitchen-garden to help her grandmother grow vegetables. Jimmy and Betty have a good time on the farm in summer.