题目内容

48()

A. informative
B. informed
C. knowledgeable
D. familiar

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53()

A. to
B. for
C. on
D. toward

45()

A. teaching
B. instructive
C. constructive
D. illuminating

52()

A. up to
B. into
C. down
D. inside

According to Para. one, experts have interests in __________.

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