A．they have to learn new things consciously.
B．they lack the confidence of securing reliable and trustworthy information.
C．they have difficulty obtaining the needed information readily.
D．they can hardly carry out casual communications with an extended family.
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A．the lack of stable communities.
B．the breakdown of informal information channels.
C．the increased mobility of families.
D．the growing number of people moving from place to place.
A．humiliating.
B．permanent.
C．too difficult to overcome.
D．too troublesome to hold on.
A．electronic mail will soon play a dominant role in transmitting messages.
B．it will become more difficult for people to keep secrets in an information era.
C．people will spend less time holding meetings or conferences.
D．events will be reported on the spot mainly through satellites.