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041. 听下面材料，回答第(1) (2) (3) 题。
(1) When did Jones have to work?
A. In 1948.
B. In 1971.
C. In 1979.
(2) What did Jones study in the University of Pennsylvania?
A. Math.
B. Construction.
C. Computer.
(3) How old was Joe Jones when he completed the work on his master's degree?
A. 48.
B. 55.
C. 65.
