单项选择题
A．he B．who C．which D．what
A．One of the biggest barriers to Internet use is getting wires into rural areas. B．The wireless computers will be cheaper. C．People in rural areas don’t have anything else to do. D．People in rural areas already have wireless boxes on their roofs.
A．even Americans are surprised at the big differences among themselves B．there are many differences in character in different parts of the USA C．there are many reason for the differences D．stereotypes about people are not necessarily true