
28.What is the purpose of the first paragraph?
A.To describe the development of cyberspace.
B.To show the great contributions from business,
C.To explain the technologies adopted by businesses.
D.To draw attention to potential dangers from cyberspace.
29.What's the author's concern about the businesses?
A.Awareness of safety.
B.Financial conditions.
C.Commercial management.
D.Judgement of development.