16-20题为阅读理解。 Dad: Bill Green Job: Doctor Age: 45 Date of Birth: Sept. 8 Hobby: Reading books and newspaper Mum: Mary Green Job: Teacher Age: 43 Date of Birth: Aug. 1 Hobby: Watching TV and cooking meals Son: David Job: N/A (Student) Age: 20 Date of Birth: Nov. 22 Hobby: Playing computer games, watching TV and playing football Daughter: Lucy Job: N/A (Student) Age: 16 Date of Birth: May 12 Hobby: Playing the guitar and seeing films There are ____ people in the family.