[单项选择]

Australia is nearly as large as the United States, but dost of it is too dry for people to live in. Around the edge of this huge dry part are large sheep and cattle farms. A few of them are as large as the smallest states in America. Often the nearest neighbors are many hundred miles away.
The two-way radio is very important to people who live on these great Australian farms. It works much like a telephone. A person can listen to someone else talk and give an answer.
When these radios first came into using, the Australian government set up for them in some areas. At a certain time each day, the boys and girls turn on their radios and listen to teachers in cities miles away. Families on the large farms wanted to give news to their neighbors. "Round Robin (知更鸟) Talks" by radio were started to keep families in touch with each other. They could talk about who was going away or who was sick or who was getting married. The men could talk about their sheep and
A. Most of Australia is too dry for people to live in and it is the same with the USA.
B. Some of the Australian farms are very large.
C. The people on the farms don’t have neighbors because they live far away from each other.
D. The Australian children don’t like to go to school at all.