根据短文内容，完成下面各题，每空词数不限 
My English teacher is Mary. She is from England. Her father is Nick and her mother is Rose. They are very old. So they don’t work now. Mary has two children, a son and a daughter. Her daughter is Betty. Her son is John. Mary and her daughter are in China, but her husband Paul Smith is in England. Her son is in America. Paul is a police officer. John is a college student. Betty and I are in the same school. We are classmates. We are in Class Three, Grade Seven.
Betty is Mary’s____ .
Betty’s father is a ____  (职业).
____ teaches the writer(作者) English.
Mary comes from ____  .
Nick and Rose are Mary’s ____  .

7－0=____

被称为“地球之肺”的是：