阅读短文及文后A～E选项，选出可以填入各题空白处的最佳选项．
In the middle of my home country there are very large places．They are hot and dry land called deserts．
Families live a long way from other people．Sometimes they are the only people for thousands of kilometres．
About 65years ago these people found that using strong radios was a possible way for families living far away to communicate with each other．They decided they could use the radios for school．In this way，children could talk to each other like at school．
The children each spent about 30minutes a day on the radio．They talked to their teacher about their work and difficulties．The teacher designed some exercises and tasks based on what they learned and posted them to the children．After finishing their work，the children sent it back to their teacher to mark． He tried to visit each child twice each year．This was sometimes difficult．The journey was very long and could be dangerous．In addition，the school held camps once a year．The children could all meet each other and shared their learning experience．
The government provides families with computers so that the children can use the Internet to talk to their teachers and classmates by e﹣mail now．The teachers enjoy their work very much because they get to know the children and their families very well．It is an interesting way to learn，don't you think？
A．The teacher also travelled around the country．
B．All over the deserts are farms and small towns．
C．This was how the first"School of the Air"started．
D．This families'children cannot go to school like you．
E．With the development of technology，computers are becoming popular．
