Robert is nine years old and Joanna is seven.They live at Mo

Robert is nine years old and Joanna is seven.They live at Mount Ebenezer.Their father has a big property.In Australia they call a farm a property.
Robert and Joanna like school very much.At school they can talk to their friends,but Robert and Joanna cannot see their friends.They live 100,perhaps 300,miles away and like Robert and Joanna,they all go to school by radio.
Mount Ebenezer is in the centre of Australia.Not many people live in "The Centre".There are no schools with desks and blackboards or teachers in "The Centre".School is a room at home with a two-way radio.The teacher also has a two-way radio.Every morning she calls each student on the radio.When all students answer,lessons begin.
Think of your teacher 300 miles away!
21.The children in "The Centre" do not go to a school because ______.
A.they live too far away from one another.B.they do not like school.
C.they are not old enough to go to school.D.their families are too poor.
22.In order to send their children to school,parents in "The Centre" of Australia must have ______.
A.a property.B.a car.
C.a school room at home.D.a special radio.
23.Teachers in "The Centre" of Australia teach ______.
A.not in a classroom but at the homes of the students.
B.by speaking only and not showing anything in writing.
C.without knowing whether the students are attending .
D.teach the students face to face
24.When children are having a lesson,they can hear their teacher .
A.but their teacher cannot hear them.
B.and their teacher can hear them too.
C.but cannot hear their schoolmates.
D.and see him or her at the same time.
25.A "Property" in Australia is a
A.house.B.school.
C.farm.D.radio.