The rich life the wealthy man had long been used to______greatly soon after the big failure of his business in 2008.
A. changed
B. change
C. changing
D. being changed
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The author has written the passage mainly for______.
A. young children
B. experienced operators
C. common readers
D. scientists in the computer field
Paper money printed by banks must be exchanged for metal money______demand.
A. of
B. with
C. on
D. from
Which of the following factors are very important in developing friendships？
Age and background.
B. Economic and social positions.
C. Race and looks.
D. Same interests and behavior.
A．valuableB．worthC．commonD．adequate
A. valuable
B. worth
C. common
D. adequate
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