A.in search of
B.in pursuit of
C.in view of
D.in light of


A.progressive
B.provocative
C.perpetual
D.prevalent
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.
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.